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ITU-T X.843 (10/2000)

Information technology – Security techniques – Specification of TTP services to support the application of digital signatures
This Recommendation \| International Standard defines the services required to support the application of digital signatures for non-repudiation of creation of a document. Since this implies integrity of the document and authenticity of the creator, the services described can also be combined to implement integrity and authenticity services.

Citation:	https://handle.itu.int/11.1002/1000/5053
Series title:	X series: Data networks, open system communications and security X.800-X.849: Security
Approval date:	2000-10-06
Identical standard:	ISO/IEC 15945:2002 (Common)
Provisional name:	X.ttp2
Approval process:	WTSA
Status:	In force
Maintenance responsibility:	ITU-T Study Group 17
Further details:	Patent statement(s)

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
1	X.843 (10/2000)	In force	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
X Suppl. 2 (09/2007)	ITU-T X.800-X.849 series – Supplement on security baseline for network operators	In force	here	here	here
X Suppl. 3 (04/2008)	ITU-T X.800-X.849 series – Supplement on guidelines for implementing system and network security	In force	here	here	here
X Suppl. 15 (09/2012)	ITU-T X.800-X.849 series - Supplement on guidance for creating a national IP-based public network security centre for developing countries	In force	here	here	here
X Suppl. 16 (09/2012)	ITU-T X.800-X.849 series – Supplement on architectural systems for security controls for preventing fraudulent activities in public carrier networks	In force	here	here	here

X.843 (2000-10)

Index of all ASN.1 assignments defined in this Recommendation.

Click here to download all the modules of this Recommendation (zipped archive)

Click here to download all the modules needed to compile this Recommendation (zipped archive)

Title	Approved on	Download
Security in telecommunications and information technology (8th edition)	2024	here
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
Security in telecommunications and information technology (7th edition)	2020	here
Security in Telecommunications and Information Technology	2015	here
Security in Telecommunications and Information Technology	2011	here
Security in Telecommunications and Information Technology	2004	here
Security in Telecommunications and Information Technology	2003	here