SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
(Main)Lawful Interception (LI) - Handover Interface and Service-Specific Details (SSD) for IP delivery - Part 2: Service-specific details for messaging services
Lawful Interception (LI) - Handover Interface and Service-Specific Details (SSD) for IP delivery - Part 2: Service-specific details for messaging services
The present document contains a stage 1 like description of the interception information in relation to the process of
sending and receiving asynchronous messages. The present document also contains a stage 2 like description of when
Intercept Related Information (IRI) and Content of Communication (CC) need to be sent, and what information it needs
to contain.
Examples of asynchronous messages include email, unified messaging and chat applications.
The definition of handover transport and encoding of HI2 and HI3 is outside the scope of the present document. Refer
to ETSI TS 102 232-1 [3].
The present document is designed to be used where appropriate in conjunction with other deliverables that define the
service specific IRI data formats. The present document aligns with 3GPP TS 33.108 [5], ETSI TS 101 671 [i.3], ETSI
TS 101 331 [1] and ETSI TR 101 944 [i.1].
Zakonito prestrezanje (LI) - Izročilni vmesnik in storitveno specifične podrobnosti (SSD) za IP-dostavo vsebin - 2. del: Storitveno specifične podrobnosti za sporočilne storitve
Ta dokument vsebuje opis 1. stopnje za informacije o prestrezanju v zvezi s pošiljanjem in prejemanjem asinhronih sporočil. Vsebuje tudi opis 2. stopnje o tem, kdaj je treba poslati podatke o prestreženi komunikaciji (IRI) ali vsebino komunikacije (CC) in katere informacije morajo biti vključene.
Primeri asinhronih sporočil so e-pošta, poenoteno sporočanje in aplikacije za klepet.
Opredelitev prenosa izročanja in kodiranja vmesnikov HI2 in HI3 ne spada na področje uporabe tega dokumenta. Glej specifikacijo ETSI TS 102 232-1 [3].
Kjer je to ustrezno, je treba ta dokument uporabljati v povezavi z drugimi dokumenti, ki določajo storitveno specifične oblike zapisa podatkov o prestreženi komunikaciji. Ta dokument je usklajen z dokumenti 3GPP TS 33.108 [5], ETSI TS 101 671 [i.3], ETSI TS 101 331 [1] in ETSI TR 101 944 [i.1].
General Information
Buy Standard
Standards Content (Sample)
ETSI TS 102 232-2 V3.16.1 (2023-03)
TECHNICAL SPECIFICATION
Lawful Interception (LI);
Handover Interface and
Service-Specific Details (SSD) for IP delivery;
Part 2: Service-specific details for messaging services
---------------------- Page: 1 ----------------------
2 ETSI TS 102 232-2 V3.16.1 (2023-03)
Reference
RTS/LI-00236-2
Keywords
email, handover, interface, IP, lawful interception,
security, traffic
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871
Important notice
The present document can be downloaded from:
https://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
her, no representation or warranty is made of merchantability or fitness
and/or governmental rule and/or regulation and furt
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.
Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2023.
All rights reserved.
ETSI
---------------------- Page: 2 ----------------------
3 ETSI TS 102 232-2 V3.16.1 (2023-03)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 10
3.1 Terms . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
4 General . 12
4.1 E-mail services . 12
4.2 Unified messaging . 12
5 E-mail system model . 13
5.1 Reference network topology. 13
5.2 Reference scenarios . 14
5.2.1 E-mail send failure . 14
5.2.2 E-mail send success . 15
5.2.3 E-mail download detail . 16
5.2.4 E-mail send detail . 16
6 E-mail events . 17
6.1 Introduction . 17
6.2 E-mail send event . 17
6.2.1 Introduction. 17
6.2.2 E-mail send captured content . 18
6.2.3 E-mail send IRI . 18
6.3 E-mail receive event . 18
6.3.1 Introduction. 18
6.3.2 E-mail receive captured content . 19
6.3.3 E-mail receive IRI . 19
6.4 E-mail download event . 19
6.4.1 Introduction. 19
6.4.2 E-mail download captured content . 20
6.4.3 E-mail download IRI . 20
7 E-mail attributes . 20
7.0 Availability of information . 20
7.1 E-mail protocol ID. 21
7.2 E-mail address . 21
7.3 E-mail recipient list . 21
7.4 E-mail sender . 21
7.5 Total recipient count . 21
7.6 Message ID . 21
7.7 Status . 21
7.8 Server and client port . 22
7.9 Server and client octets sent . 22
7.10 AAAInformation . 22
8 Unified Messaging events . 22
8.0 Generic description. 22
8.1 Delivery of CC . 23
ETSI
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4 ETSI TS 102 232-2 V3.16.1 (2023-03)
8.2 Messaging events . 24
8.3 Messaging box events . 25
8.4 Messaging notification events . 27
8.5 Messaging call events . 28
8.6 Signalling of party information . 28
8.7 Messaging properties . 29
Annex A (normative): SMTP . 33
A.1 SMTP introduction . 33
A.2 SMTP HI2 events . 33
A.2.1 E-mail login event . 33
A.2.2 E-mail send event . 33
A.2.3 E-mail receive event . 33
A.3 SMTP HI2 attributes . 34
A.4 SMTP HI2 event-record mapping . 34
Annex B (normative): POP3 . 35
B.1 POP3 introduction . 35
B.2 POP3 HI2 events . 35
B.2.1 E-mail login event . 35
B.2.2 E-mail download event . 35
B.2.3 E-mail partial download event . 35
B.3 POP3 HI2 attributes . 36
B.4 POP3 HI2 event-record mapping . 36
B.5 POP3 HI3 delivery of Content of Communication . 37
B.6 POP3 Interception example . 37
Annex C (normative): IMAP4 . 38
C.1 IMAP4 introduction . 38
C.2 IMAP4 HI2 event-record mapping . 38
C.3 IMAP4 HI3 delivery of call content . 39
C.4 IMAP4 Interception example . 39
Annex D (normative): Messaging ASN.1 . 41
Annex E (informative): E-mail LI requirements . 42
E.1 HI2 requirements . 42
E.2 HI3 requirements . 43
E.3 General requirements . 44
E.4 Requirements mapping . 44
Annex F (informative): SMTP characteristics . 45
F.1 SMTP service characteristics . 45
F.2 SMTP protocol characteristics . 45
Annex G (informative): POP3 characteristics . 46
G.1 POP3 service characteristics . 46
G.2 POP3 protocol characteristics . 46
ETSI
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5 ETSI TS 102 232-2 V3.16.1 (2023-03)
Annex H (informative): Discussion of webmail interception . 47
H.1 Webmail network topology . 47
H.2 Webmail protocols . 47
H.3 Webmail interception . 48
Annex I (informative): Discussion for Driving HI2 of HI3 . 49
I.1 Introduction . 49
I.2 Discussion . 49
I.2.1 Introduction . 49
I.2.2 IP packets . 50
I.2.3 TCP packets. 50
I.2.4 SMTP packets . 50
I.2.5 E-mail messages . 50
I.3 Conclusion . 51
Annex J (informative): Change Request History . 52
Annex K (informative): Bibliography . 56
History . 57
ETSI
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6 ETSI TS 102 232-2 V3.16.1 (2023-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the
®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Lawful Interception (LI).
The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [3].
The ASN.1 module is available as an electronic attachment to the present document (see details in annex D).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document describes what information is required for the handover of intercepted IP-based messaging traffic
from a Communications Service Provider to an LEMF. The present document covers a stage 2 description of the data,
but does not specify any functionality within the scope of ETSI TS 102 232-1 [3].
The Recommendation ITU-T I.130 [6] method for characterizing a service will be used as a general framework for the
present document. The modified concept of a "stage 1" will be called the "attributes" of the interface. The attributes of
the interface are the sum total of the entire constituent attributes that an interface may need to communicate. The
modified concept of a "stage 2" will be called the "events" of the interface. The events of the interface define the rules
of the relationships between the attributes that are required to arrange the disjoint attributes into meaningful information
for a messaging service interaction.
ETSI
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7 ETSI TS 102 232-2 V3.16.1 (2023-03)
The present document is intended to be general enough to be used in a variety of messaging services. It should be
recognized that a side effect of this approach is some IRI fields identified may be difficult to extract or non-existent
depending on the messaging service being intercepted. In such cases it may be completely reasonable that the delivered
IRI contain empty fields or fields with the value 0.
ETSI
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8 ETSI TS 102 232-2 V3.16.1 (2023-03)
1 Scope
The present document contains a stage 1 like description of the interception information in relation to the process of
sending and receiving asynchronous messages. The present document also contains a stage 2 like description of when
Intercept Related Information (IRI) and Content of Communication (CC) need to be sent, and what information it needs
to contain.
Examples of asynchronous messages include email, unified messaging and chat applications.
The definition of handover transport and encoding of HI2 and HI3 is outside the scope of the present document. Refer
to ETSI TS 102 232-1 [3].
The present document is designed to be used where appropriate in conjunction with other deliverables that define the
service specific IRI data formats. The present document aligns with 3GPP TS 33.108 [5], ETSI TS 101 671 [i.3], ETSI
TS 101 331 [1] and ETSI TR 101 944 [i.1].
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 331: "Lawful Interception (LI); Requirements of Law Enforcement Agencies".
[2] Void.
[3] ETSI TS 102 232-1: "Lawful Interception (LI); Handover Interface and Service-Specific Details
(SSD) for IP delivery; Part 1: Handover specification for IP delivery".
[4] Void.
[5] ETSI TS 133 108: "Universal Mobile Telecommunications System (UMTS); LTE; Digital cellular
telecommunications system (Phase 2+) (GSM); 3G security; Handover interface for Lawful
Interception (LI) (3GPP TS 33.108)".
[6] Recommendation ITU-T I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[7] IETF RFC 5322: "Internet Message Format".
NOTE 1: IETF RFC 5322 obsoletes IETF RFC 2822: "Internet Message Format".
NOTE 2: IETF RFC 2822 obsoletes IETF RFC 0822: "Standard for the format of ARPA Internet text messages".
[8] IETF RFC 1939: "Post Office Protocol - Version 3".
[9] IETF RFC 5321: "Simple Mail Transfer Protocol".
NOTE: IETF RFC 5321 obsoletes IETF RFC 2821: "Simple Mail Transfer Protocol".
ETSI
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9 ETSI TS 102 232-2 V3.16.1 (2023-03)
[10] IETF RFC 9051: "Internet Message Access Protocol (IMAP)- Version 4rev2".
NOTE: IETF RFC 9051 obsoletes IETF RFC 3501: "Internet Message Access Protocol - Version 4rev1".
[11] Recommendation ITU-T X.680/ISO/IEC 8824-1: "Information technology -- Abstract Syntax
Notation One (ASN.1): Specification of basic notation".
[12] ISO 3166-1: "Codes for the representation of names of countries and their subdivisions -- Part 1:
Country code".
[13] IETF RFC 4954: "SMTP Service Extension for Authentication".
NOTE: IETF RFC 4954 obsoletes IETF RFC 2554: "SMTP Service Extension for Authentication".
[14] Void.
[15] IETF RFC 3493: "Basic Socket Interface Extensions for IPv6".
[16] IETF RFC 4422: "Simple Authentication and Security Layer (SASL)".
NOTE: IETF RFC 4422 obsoletes IETF RFC 2222: "Simple Authentication and Security Layer (SASL)".
[17] IETF RFC 3207: "SMTP Service Extension for Secure SMTP over Transport Layer Security".
[18] IETF RFC 2595: "Using TLS with IMAP, POP3 and ACAP".
[19] IETF RFC 4616: "The PLAIN Simple Authentication and Security Layer (SASL) Mechanism".
[20] IETF RFC 2045: "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet
Message Bodies".
[21] IETF RFC 2046: "Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types".
[22] Void.
[23] ETSI EN 300 356 (all parts): "Integrated Services Digital Network (ISDN); Signalling System
No.7 (SS7); ISDN User Part (ISUP) version 4 for the international interface".
[24] IETF RFC 4646: "Tags for Identifying Languages".
[25] Recommendation ITU-T E.164: "The international public telecommunication numbering plan".
[26] IETF RFC 3696: "Application Techniques for Checking and Transformation of Names".
[27] R
...
SLOVENSKI STANDARD
SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
01-julij-2023
Zakonito prestrezanje (LI) - Izročilni vmesnik in storitveno specifične podrobnosti
(SSD) za IP-dostavo vsebin - 2. del: Storitveno specifične podrobnosti za
sporočilne storitve
Lawful Interception (LI) - Handover Interface and Service-Specific Details (SSD) for IP
delivery - Part 2: Service-specific details for messaging services
Ta slovenski standard je istoveten z: ETSI TS 102 232-2 V3.16.1 (2023-03)
ICS:
35.240.95 Spletne uporabniške rešitve Internet applications
SIST-TS ETSI/TS 102 232-2 V3.16.1:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
ETSI TS 102 232-2 V3.16.1 (2023-03)
TECHNICAL SPECIFICATION
Lawful Interception (LI);
Handover Interface and
Service-Specific Details (SSD) for IP delivery;
Part 2: Service-specific details for messaging services
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
2 ETSI TS 102 232-2 V3.16.1 (2023-03)
Reference
RTS/LI-00236-2
Keywords
email, handover, interface, IP, lawful interception,
security, traffic
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871
Important notice
The present document can be downloaded from:
https://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
her, no representation or warranty is made of merchantability or fitness
and/or governmental rule and/or regulation and furt
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.
Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.
© ETSI 2023.
All rights reserved.
ETSI
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
3 ETSI TS 102 232-2 V3.16.1 (2023-03)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Introduction . 6
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 10
3 Definition of terms, symbols and abbreviations . 10
3.1 Terms . 10
3.2 Symbols . 11
3.3 Abbreviations . 11
4 General . 12
4.1 E-mail services . 12
4.2 Unified messaging . 12
5 E-mail system model . 13
5.1 Reference network topology. 13
5.2 Reference scenarios . 14
5.2.1 E-mail send failure . 14
5.2.2 E-mail send success . 15
5.2.3 E-mail download detail . 16
5.2.4 E-mail send detail . 16
6 E-mail events . 17
6.1 Introduction . 17
6.2 E-mail send event . 17
6.2.1 Introduction. 17
6.2.2 E-mail send captured content . 18
6.2.3 E-mail send IRI . 18
6.3 E-mail receive event . 18
6.3.1 Introduction. 18
6.3.2 E-mail receive captured content . 19
6.3.3 E-mail receive IRI . 19
6.4 E-mail download event . 19
6.4.1 Introduction. 19
6.4.2 E-mail download captured content . 20
6.4.3 E-mail download IRI . 20
7 E-mail attributes . 20
7.0 Availability of information . 20
7.1 E-mail protocol ID. 21
7.2 E-mail address . 21
7.3 E-mail recipient list . 21
7.4 E-mail sender . 21
7.5 Total recipient count . 21
7.6 Message ID . 21
7.7 Status . 21
7.8 Server and client port . 22
7.9 Server and client octets sent . 22
7.10 AAAInformation . 22
8 Unified Messaging events . 22
8.0 Generic description. 22
8.1 Delivery of CC . 23
ETSI
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
4 ETSI TS 102 232-2 V3.16.1 (2023-03)
8.2 Messaging events . 24
8.3 Messaging box events . 25
8.4 Messaging notification events . 27
8.5 Messaging call events . 28
8.6 Signalling of party information . 28
8.7 Messaging properties . 29
Annex A (normative): SMTP . 33
A.1 SMTP introduction . 33
A.2 SMTP HI2 events . 33
A.2.1 E-mail login event . 33
A.2.2 E-mail send event . 33
A.2.3 E-mail receive event . 33
A.3 SMTP HI2 attributes . 34
A.4 SMTP HI2 event-record mapping . 34
Annex B (normative): POP3 . 35
B.1 POP3 introduction . 35
B.2 POP3 HI2 events . 35
B.2.1 E-mail login event . 35
B.2.2 E-mail download event . 35
B.2.3 E-mail partial download event . 35
B.3 POP3 HI2 attributes . 36
B.4 POP3 HI2 event-record mapping . 36
B.5 POP3 HI3 delivery of Content of Communication . 37
B.6 POP3 Interception example . 37
Annex C (normative): IMAP4 . 38
C.1 IMAP4 introduction . 38
C.2 IMAP4 HI2 event-record mapping . 38
C.3 IMAP4 HI3 delivery of call content . 39
C.4 IMAP4 Interception example . 39
Annex D (normative): Messaging ASN.1 . 41
Annex E (informative): E-mail LI requirements . 42
E.1 HI2 requirements . 42
E.2 HI3 requirements . 43
E.3 General requirements . 44
E.4 Requirements mapping . 44
Annex F (informative): SMTP characteristics . 45
F.1 SMTP service characteristics . 45
F.2 SMTP protocol characteristics . 45
Annex G (informative): POP3 characteristics . 46
G.1 POP3 service characteristics . 46
G.2 POP3 protocol characteristics . 46
ETSI
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
5 ETSI TS 102 232-2 V3.16.1 (2023-03)
Annex H (informative): Discussion of webmail interception . 47
H.1 Webmail network topology . 47
H.2 Webmail protocols . 47
H.3 Webmail interception . 48
Annex I (informative): Discussion for Driving HI2 of HI3 . 49
I.1 Introduction . 49
I.2 Discussion . 49
I.2.1 Introduction . 49
I.2.2 IP packets . 50
I.2.3 TCP packets. 50
I.2.4 SMTP packets . 50
I.2.5 E-mail messages . 50
I.3 Conclusion . 51
Annex J (informative): Change Request History . 52
Annex K (informative): Bibliography . 56
History . 57
ETSI
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SIST-TS ETSI/TS 102 232-2 V3.16.1:2023
6 ETSI TS 102 232-2 V3.16.1 (2023-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
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oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Lawful Interception (LI).
The present document is part 2 of a multi-part deliverable. Full details of the entire series can be found in part 1 [3].
The ASN.1 module is available as an electronic attachment to the present document (see details in annex D).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document describes what information is required for the handover of intercepted IP-based messaging traffic
from a Communications Service Provider to an LEMF. The present document covers a stage 2 description of the data,
but does not specify any functionality within the scope of ETSI TS 102 232-1 [3].
The Recommendation ITU-T I.130 [6] method for characterizing a service will be used as a general framework for the
present document. The modified concept of a "stage 1" will be called the "attributes" of the interface. The attributes of
the interface are the sum total of the entire constituent attributes that an interface may need to communicate. The
modified concept of a "stage 2" will be called the "events" of the interface. The events of the interface define the rules
of the relationships between the attributes that are required to arrange the disjoint attributes into meaningful information
for a messaging service interaction.
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The present document is intended to be general enough to be used in a variety of messaging services. It should be
recognized that a side effect of this approach is some IRI fields identified may be difficult to extract or non-existent
depending on the messaging service being intercepted. In such cases it may be completely reasonable that the delivered
IRI contain empty fields or fields with the value 0.
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1 Scope
The present document contains a stage 1 like description of the interception information in relation to the process of
sending and receiving asynchronous messages. The present document also contains a stage 2 like description of when
Intercept Related Information (IRI) and Content of Communication (CC) need to be sent, and what information it needs
to contain.
Examples of asynchronous messages include email, unified messaging and chat applications.
The definition of handover transport and encoding of HI2 and HI3 is outside the scope of the present document. Refer
to ETSI TS 102 232-1 [3].
The present document is designed to be used where appropriate in conjunction with other deliverables that define the
service specific IRI data formats. The present document aligns with 3GPP TS 33.108 [5], ETSI TS 101 671 [i.3], ETSI
TS 101 331 [1] and ETSI TR 101 944 [i.1].
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 101 331: "Lawful Interception (LI); Requirements of Law Enforcement Agencies".
[2] Void.
[3] ETSI TS 102 232-1: "Lawful Interception (LI); Handover Interface and Service-Specific Details
(SSD) for IP delivery; Part 1: Handover specification for IP delivery".
[4] Void.
[5] ETSI TS 133 108: "Universal Mobile Telecommunications System (UMTS); LTE; Digital cellular
telecommunications system (Phase 2+) (GSM); 3G security; Handover interface for Lawful
Interception (LI) (3GPP TS 33.108)".
[6] Recommendation ITU-T I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[7] IETF RFC 5322: "Internet Message Format".
NOTE 1: IETF RFC 5322 obsoletes IETF RFC 2822: "Internet Message Format".
NOTE 2: IETF RFC 2822 obsoletes IETF RFC 0822: "Standard for the format of ARPA Internet text messages".
[8] IETF RFC 1939: "Post Office Protocol - Version 3".
[9] IETF RFC 5321: "Simple Mail Transfer Protocol".
NOTE: IETF RFC 5321 obsoletes IETF RFC 2821: "Simple Mail Transfer Protocol".
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[10] IETF RFC 9051: "Internet Message Access Protocol (IMAP)- Version 4rev2".
NOTE: IETF RFC 9051 obsoletes IETF RFC 3501: "Internet Message Access Protocol - Version 4rev1".
[11] Recommendation ITU-T X.680/ISO/IEC 8824-1: "Information technology -- Abstract Syntax
Notation One (ASN.1): Specification of basic notation".
[12] ISO 3166-1: "Codes for the representation of names of countries and their subdivisions -- Part 1:
Country code".
[13] IETF RFC 4954: "SMTP Service Extension for Authentication".
...
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