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# ITU-T X.690

## Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)

active, Most Current
 Organization: ITU-T Publication Date: 1 August 2015 Status: active Page Count: 38
##### scope:

This Recommendation | International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation specified in Rec. ITU-T X.680 | ISO/IEC 8824-1, Rec. ITU-T X.681 | ISO/IEC 8824-2, Rec. ITU-T X.682 | ISO/IEC 8824-3, and Rec. ITU-T X.683 | ISO/IEC 8824-4, collectively referred to as Abstract Syntax Notation One or ASN.1. These basic encoding rules are also to be applied for decoding such a transfer syntax in order to identify the data values being transferred. It also specifies a set of canonical and distinguished encoding rules that restrict the encoding of values to just one of the alternatives provided by the basic encoding rules.

### Document History

February 1, 2021
(Pre-Published) Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
This Recommendation | International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation...
ITU-T X.690
August 1, 2015
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
This Recommendation | International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation...
March 1, 2014
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Technical Corrigendum 2
A description is not available for this item.
October 1, 2011
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Technical Corrigendum 1
This Recommendation | International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation...
November 1, 2008
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)
This Recommendation | International Standard specifies a set of basic encoding rules that may be used to derive the specification of a transfer syntax for values of types defined using the notation...
May 1, 2007
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Technical Corrigendum 1
A description is not available for this item.
June 1, 2006
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Amendment 2: Time type support
A description is not available for this item.
October 1, 2003
Information technology – ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Amendment 1: Support for EXTENDED-XER SERIES X: DATA NETWORKS AND OPEN SYSTEM COMMUNICATIONS OSI networking and system aspects – Abstract Syntax Notation One (ASN.1)
A description is not available for this item.
July 1, 2002
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) - Series X: Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax Notation One (ASN.1)
A description is not available for this item.
June 1, 1999
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Technical Corrigendum 1 Series X: Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax Notation One (ASN.1)
A description is not available for this item.
June 1, 1999
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) Amendment 1: Rel ative Object Identifiers Series X: Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax Notation One (ASN.1)
A description is not available for this item.
December 1, 1997
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) - Series X: Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax Notation One (ASN.1)
A description is not available for this item.
January 1, 1994
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) - Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax Notation One (ASN.1) Technical Corrigendum 1
A description is not available for this item.
January 1, 1994
Information Technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) - Data Networks and Open System Communications OSI Networking and System Aspects - Abstract Syntax - Notation One (ASN.1)
A description is not available for this item.