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ITU-T X.680 (02/2021)

Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation

Recommendation ITU-T X.680 | ISO/IEC 8824-1 provides a notation called Abstract Syntax Notation One (ASN.1) for
defining the syntax of information data. It defines a number of simple data types and specifies a notation for referencing
these types and for specifying values of these types.

The ASN.1 notations can be applied whenever it is necessary to define the abstract syntax of information without

constraining in any way how the information is encoded for transmission.

Citation:	https://handle.itu.int/11.1002/1000/14468
Series title:	X series: Data networks, open system communications and security X.600-X.699: OSI networking and system aspects X.680-X.699: Abstract Syntax Notation One (ASN.1)
Approval date:	2021-02-13
Identical standard:	ISO/IEC 8824-1 (Common)
Approval process:	AAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 17
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
6	X.680 (02/2021)	In force	here	-	here
5.4	X.680 (2015) Amd. 1 (05/2018)	Superseded	here	-	here
5.3	X.680 (2015) Cor. 3 (05/2018)	Superseded	here	here	here
5.2	X.680 (2015) Cor. 2 (10/2017)	Superseded	here	-	here
5.1	X.680 (2015) Cor. 1 (05/2017)	Superseded	here	-	here
5	X.680 (08/2015)	Superseded	here	here	here
4.2	X.680 (2008) Cor. 2 (03/2014)	Superseded	here	-	here
4.1	X.680 (2008) Cor. 1 (10/2011)	Superseded	-	-	here
4	X.680 (11/2008)	Superseded	here	here	here
3.5	X.680 (2002) Amd. 4 (05/2007)	Superseded	here	here	here
3.4	X.680 (2002) Amd. 3 (06/2006)	Superseded	here	here	here
3.3	X.680 (2002) Technical Cor. 1 (05/2005)	Superseded	here	-	here
3.2	X.680 (2002) Amd. 2 (08/2004)	Superseded	here	here	here
3.1	X.680 (2002) Amd. 1 (10/2003)	Superseded	here	here	here
3	X.680 (07/2002)	Superseded	-	-	here
2.8	X.680 (1997) Amd. 4 (10/2001)	Superseded	here	-	here
2.7	X.680 (1997) Amd. 3 (10/2001)	Superseded	here	-	here
2.6	X.680 (1997) Technical Cor. 4 (03/2001)	Superseded	here	here	here
2.5	X.680 (1997) Technical Cor. 3 (02/2001)	Superseded	here	here	here
2.4	X.680 (1997) Technical Cor. 2 (03/2000)	Superseded	-	here	here
2.3	X.680 (1997) Amd. 2 (06/1999)	Superseded	here	here	here
2.2	X.680 (1997) Amd. 1 (06/1999)	Superseded	here	here	here
2.1	X.680 (1997) Technical Cor. 1 (06/1999)	Superseded	here	here	here
2	X.680 (12/1997)	Superseded	here	here	here
1.5	X.680 (1994) Amd. 2 (12/1997)	Superseded	-	-	here
1.4	X.680 (1994) Amd. 1/Technical Cor. 1 (12/1997)	Superseded	-	-	here
1.3	X.680 (1994) Technical Cor. 2 (12/1997)	Superseded	-	-	here
1.2	X.680 (1994) Technical Cor. 1 (11/1995)	Superseded	-	-	here
1.1	X.680 (1994) Amd. 1 (04/1995)	Superseded	-	-	here
1	X.680 (07/1994)	Superseded	-	-	here

Title	Approved on	Download
Guidelines for identity-based cryptosystems used for cross-domain secure communications	2023	here
Overview of hybrid approaches for key exchange with quantum key distribution	2022	here
Guidelines for security management of using artificial intelligence technology	2022	here
Successful use of security standards (2nd edition)	2020	here
Description of the incubation mechanism and ways to improve it	2020	here
Strategic approaches to the transformation of security studies	2020	here
OID resolution system: Problems, requirements and potential solutions	2020	here

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ITU-T Recommendations

ITU-T X.680 (02/2021)