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Short History of Study Group 17

The following is a short history of Study Group 17 and the related X-series and Z-series of Recommendations. As many of you know SG 17 was formed by the merger of Study Groups 7 and 10 in 2001.

Study Group 7 had its roots back to the Joint Working Party on New Data Networks, which was created by the IVth Plenary Assembly of the CCITT in 1968. Table 1 below shows the evolution over the various study periods and the study group leadership until the merger with SG 10 in 2001. The work program evolved significantly over this time. In the late 60s and early 70s, the work focused on digital leased lines and digital circuit switched data networks with the first X-series Recommendations approved at the December 1972 Vth CCITT Plenary Assembly. Packet switched networks was the hot topic of the 70s and 80s with the first edition of the famous X.25 Recommendation approved in 1976. An ever increasing number of packet data network Recommendations were developed and approved in 1980, 1984 and 1988. Work on Open Systems Interconnection (OSI) in conjunction with ISO and IEC began in the early 80s and was very intense through the 80s and 90s. By 2000, this work had reached maturity and SG VII began to build its efforts on security.

Study Group 10 had its roots as part of the work of CCITT Study Group XI with three Questions on languages for stored program control telephone exchanges adopted by the Vth CCITT Plenary Assembly in 1972. Table 2 below shows the evolution over the various study periods and the study group leadership until the merger with SG 7. In 1976, skeleton Recommendations on Specification and Description Language (SDL) and Man-Machine Language (MML) were adopted as the first Z-series Recommendations. These were further developed in the next 8 years along with CHILL with approvals in 1980 and 1984. The VIIIth CCITT Plenary Assembly in October 1984 established Study Group 10. By 2000, a suite of Z-series Recommendations was in place with MSC (Message Sequence Chart) as the major addition in the 1990s. Focus in the later years moved to aligning ITU-T languages, such as SDL and MSC, to OMG’s UML (Unified Modeling Language).

In 2001, TSAG agreed to merge Study Groups 7 and 10 to form Study Group 17 (7 + 10 = 17). The chairman of the two study groups became co-chairmen of the new Study Group 17 and all the vice chairmen of the two study groups became vice chairman of the new Study Group 17. Table 3 below shows the evolution of Study Group 17 over the three study periods and the study group leadership. A major change was made at WTSA-04 when the remaining data network work was transferred to Study Group 13 and the major focus of Study Group 17 was shifted to security while also continuing its work on languages. By WTSA-08, a substantial set of security Recommendations had been approved and WTSA-08 changed the title of Study Group 17 to Security. the role of Study Group 17 was continued essentially unchanged by WTSA-12. Study Group 17 has lead study group responsibilities for:

  • Security
  • Identity management (IdM) 
  • Languages and description techniques

Table 4 shows the history of X and Z series Recommendations approved by the various CCITT Plenary Assemblies. After 1988, Recommendations were developed, approved and published individually, rather than in the sequence of color books published every four years. The X-series expanded in scope over the years from “New data networks” to “Data communication networks” to “Data networks and open system communications” to “Data networks, open system communications and security”. In a similar manner, the Z-series expanded over the years from “Programming languages for SPC exchanges" to "Programming languages”, to “Languages and general software aspects for telecommunication systems”. Tables 5, 6, 7 and 8 show the set of 315 approved Recommendations and 18 approved Supplements under the responsibility of Study Group 17 as of 15 June 2013.


Table 1 - Leadership of Study Group 7 and predecessors

Study Period Designation Name Chairman Vice Chairmen Number of Questions
1969-1972 JWP/NRD New data networks O. A. Ohlmer (Germany) V. C. MacDonald 1
1973-1976 Study Group VII New networks for data transmission V. C. MacDonald (Canada) N. R. Crane (Australia)
H. Gabler (Germany)
A. E. Serrure (Belgium)
1 (25 points)
1977-1980 Study Group VII New networks for data transmission V. C. MacDonald (Canada) J. Chapman (UK)

N. R. Crane (Australia)
M. Kato (Japan)
A. Texier (France)
34
1981-1984 Study Group VII Data communication networks V. C. MacDonald (Canada) H. V. Bertine (USA)
M. Kato (Japan)
L. Lavandera Sanchez (Spain)
A. Texier (France)
J. O. Wedlake (UK)
41
1985-1988 Study Group VII Data communication networks J. O. Wedlake (UK) H. V. Bertine (USA)
P. G. Bowie (Canada)
P. Guinaudeau (France)
L. Lavandera Sanchez (Spain)
R. Parodi (Italy)
S. Tomita (Japan)
48
1989-1992 Study Group VII Data communications networks J. O. Wedlake (UK) H. V. Bertine (USA)
P. G. Bowie (Canada)
L. Lavandera Sanchez (Spain)
J. Park (Australia)
R. Parodi (Italy)
P. Puges (France)
S. Tomita (Japan)
15
1993-1996 Study Group 7 Data networks and open systems communications H. V. Bertine (USA) V. Ossipov (Russia)
S. Tomita (Japan)
C. H. Yim (Korea)
25
1997-2000 Study Group 7 Data networks and open system communications H. V. Bertine (USA) Y. H. Lee (Korea)
Y. Hiramatsu (Japan)
V. Ossipov (Russia)
25
2001-16/9/01 Study Group 7 Data networks and open systems communications H. V. Bertine (USA) B.-M. Chin (Korea)
V. Ossipov (Russia)
14


Table 2 - Leadership of Study Group 10 and predecessors

 
Study Period Designation Name Chairman Vice Chairmen Number of Questions
1973-1976 Study Group XI Telephone switching and signalling J. S. Ryan (USA) T. Moussa (Cameroon)
P. Plehiers (Belgium)
P. Sterndorff (Denmark)
3 out of 11
1977-1980 Study Group XI Telephone switching and signalling J. S. Ryan (USA) C. A. Adeoye (Nigeria)
P. Plehiers (Belgium)
P. Sterndorff (Denmark)
3 out of 13
1981-1984 Study Group XI Telephone switching and signalling J. S. Ryan (USA) P. Collet (France)
S. Kano (Japan)
P. Plehiers (Belgium)
P. Sterndorff (Denmark)
3 out of 19
1985-1988 Study Group X Languages and methods for telecommunications applications C. Carrelli (Italy) K. Katzeff (Sweden)
N. A. Martellotto (USA)
K. Schulz (Germany)
9
1989-1992 Study Group X Languages for telecommunication applications C. Carrelli (Italy) O. F. Faergemand (Denmark)
B. Lindberg (S)
K. Schulz (Germany)
12
1993-1996 Study Group 10 Languages for telecommunication applications O. F. Faergemand (Denmark) K. Schulz (Germany) 10
1997-2000 Study Group 10 Languages and general software aspects for telecommunication systems A. Sarma (Germany) A. Meisingset (Norway) 13
2001-16/9/2001 Study Group 10 Languages and general software aspects for telecommunication systems A. Sarma (Germany) V. Efimouchkine (Russia)
A. Meisingset (Norway)
O. Monkewich (Canada)
13


 
Table 3 - Leadership of Study Group 17

 
Study Period Designation Name Chairman Vice Chairmen Number of Questions
17/9/2001-2004 Study Group 17 Data networks and telecommunication software Co-chairmen:
Herbert Bertine (USA)
and
Amardeo Sarma (Germany)
Byoung-Moon Chin (Korea)
Vladimir Efimouchkine (Russia)
Arve Meisingset (Norway)
Ostap Monkewich (Canada)
V. Ossipov (Russia)
27
2005-2008 Study Group 17 Security, languages and telecommunication software Herbert Bertine (USA) Jianyong Chen (China)
Byoung-Moon Chin (Korea)
Arkadiy Kremer (Russia)
Arve Meisingset (Norway)
Ostap Monkewich (Canada)
Yu Watanabe (Japan)
17
2009-2012 Study Group 17 Security Arkadiy Kremer (Russia) Jianyong Chen (China)
Mohamed M.K. Elhaj (Sudan)
Antonio Guimaraes (Brazil)
Patrick Mwesigwa (Uganda)
Koji Nakao (Japan)
Heung Youl Youm (Korea)
15
​2013-2016 ​Study Group 17 ​ Security Arkadiy Kremer (Russia) Khalid Belhoul (United Arab Emirates)
Mohamed M.K. Elhaj (Sudan)
Mario German Fromow Rangel (Mexico)
Antonio Guimaraes (Brazil)
Zhaoji (George) Lin (China)
Patrick Mwesigwa (Uganda)
Koji Nakao (Japan)
Sacid Sarikaya (Turkey)
Heung Youl Youm (Korea)
​12


Table 4 - CCITT Plenary Assemblies and Recommendations Approved

 
Study Period Book Plenary Assembly Dates X-series Recommendations Z-series Recommendations
1969-1972 Green Book Vth CCITT Plenary Assembly 4-15 December 1972 11 (Public data networks - X.1, X.2, X.20, X.21, X.30, X.31, X.32, X.33, X.40, X.50, X.70)  
1973-1976 Orange Book VIth CCITT Plenary Assembly 27 September – 8 October 1976 24 (Public data networks) 3 (SDL – Z.100-series)
8 (MML – Z.300-series)
1977-1980 Yellow Book VIIth CCITT Plenary Assembly 10-21 November 1980 39 (Public data networks) 4 (SDL – Z.100-series)
1 (CHILL – Z.200)
9 (MML – Z.300-series)
1981-1984 Red Book VIIIth CCITT Plenary Assembly 8-19 October 1984 56 (Public data networks)
9 (OSI – X.200-series)
8 (MHS – X.400-series))
5 (SDL – Z.100-series)
1 (CHILL – Z.200)
15 (MML – Z.300-series)
1985-1988 Blue Book IXth CCITT Plenary Assembly 14-25 November 1988 72 (Public data networks)
23 (OSI – X.200-series)
9 (MHS – X.400-series))
8 (Directory – X.500-series))
1 (SDL – Z.100)
1 (FDTs – Z.110)
1 (CHILL – Z.200)
19 (MML – Z.300-series)


Table 5 - E-series Recommendations under the responsibility of Study Group 17*

OVERALL NETWORK OPERATION, TELEPHONE SERVICE, SERVICE OPERATION AND HUMAN FACTORS

 
Subject Recommendation Series Number of Texts
International operation E.100-E.229 2
General provisions concerning Administrations E.104-E.119 2
Network management E.400-E.489 1
International network management E.405-E.419 1
* As of 15 June 2013. The 3 Recommendations are in conjunction with Study Group 2


Table 6 - F-series Recommendations under the responsibility of Study Group 17*

NON-TELEPHONE TELECOMMUNICATIONS SERVICES

 
Subject Recommendation Series Number of Texts
​Telegraph service ​F.1-F.109 1
Message handling services F.400-F.499 11
Directory services F.500-F.549 3
* As of 15 June 2013


Table 7 - X-series Recommendations under the responsibility of Study Group 17*

DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY 

 
Subject Recommendation Series Number of Texts
Open Systems Interconnection X.200-X.299 48
Model and notation X.200-X.209 2
Service definitions X.210-X.219 11
Connection-mode protocol specifications X.220-X.229 10
Connectionless-mode protocol specifications X.230-X.239 6
PICS proformas X.240-X.259 8
Protocol Identification X.260-X.269 3
Security Protocols X.270-X.279 2
Layer Managed Objects X.280-X.289 5
Conformance testing X.290-X.299 1
Message Handling Systems X.400-X.499 25
Directory X.500-X.599 10
OSI networking and system aspects X.600-X.699 37
Networking X.600-X.629 7
Efficiency X.630-X.639 6
Quality of service X.640-X.649 2
Naming, Addressing and Registration X.650-X.679 12
Abstract Syntax Notation One (ASN.1) X.680-X.699 10
Security X.800-X.849 20 + 4 Supp.
OSI applications X.850-X.899 18
Commitment, Concurrency and Recovery X.850-X.859 3
Transaction processing X.860-X.879 4
Remote operations X.880-X.889 3
Generic applications of ASN.1 X.890-X.899 3
Open distributed processing X.900-X.999 13
Information and network security X.1000-X.1999 27
General security aspects X.1000-X.1029 0
Network security X.1030-X.1049 5
Security management X.1050-X.1069 6
Telebiometrics X.1080-X.1099 11
Secure applications and services X.1100-X.1199 30 + 1 Supp.
Multicast security X.1100-X.1109 1
Home network security X.1110-X.1119 4
Mobile security X.1120-X.1139 5 + 1 Supp.
Web security X.1140-X.1149 3
Security protocols X.1150-X.1159 5
Peer-to-peer security X.1160-X.1169 3
Networked ID security X.1170-X.1179 1
IPTV security X.1180-X.1199 8
Cyberspace security X.1200-X.1299 17 + 12 Supp.
Cybersecurity X.1200-X.1229 4 + 5 Supp.
Countering spam X.1230-X.1249 7 + 5 Supp.
Identity management (IdM) X.1250-X.1279 6 + 2 Supp.
Secure applications and services X.1300-X.1399 4
    Emergency communications​      X.1300-X.1309​ 1​
    Ubiquitous sensor network security​      X.1310-X.1339​ 3
Cybersecurity information exchange​ ​X.1500-X.1599 1​6
​Overview of cybersecurity ​X.1500-X.1519 ​2
Vulnerability/state exchange​ ​X.1520-X.1539 ​9
Event/incident/heuristics exchange​ ​X.1540-X.1549 ​2
Exchange of policies​ ​X.1550-X.1559 ​0
Heuristics and information request​ ​X.1560-X.1569 ​0
Identification and discovery​ ​X.1570-X.1579 ​1
Assured exchange​ ​X.1580-X.1589 ​2
* As of 15 June 2013


Table 8 - Z-series Recommendations under the responsibility of Study Group 17*

LANGUAGES AND GENERAL SOFTWARE ASPECTS FOR TELECOMMUNICATION SYSTEMS 

 
Subject Recommendation Series Number of Texts
Formal description techniques (FDT) Z.100-Z.199 27 + 1 Supp.
Specification and Description Language (SDL) Z.100-Z.109 9 + 1 Supp.
Application of formal description techniques Z.110-Z.119 3
Message Sequence Chart (MSC) Z.120-Z.129 2
User Requirements Notation (URN) Z.150-Z.159 2
Testing and Test Control Notation (TTCN) Z.160-Z.179 12
Programming languages Z.200-Z.299 1
CHILL: The ITU-T high level language Z.200-Z.209 1
Quality Z.400-Z.499 2
Quality of telecommunication software Z.400-Z.409 1
Quality aspects of protocol-related Recommendations Z.450-Z.459 1
Middleware Z.600-Z.699 2
Processing environment architectures Z.600-Z.609 2
* As of 15 June 2013