| Encryption key management and authentication system for audiovisual services |
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This Recommendation describes three methods of encryption key management, namely:- ISO 8732;- Diffie-Hellman; and- RSA.They are applicable to the encryption of audiovisual signals transmitted digitally using the H.221 frame structure. The management messages defined here are transmitted within the H.221 Encryption Control Signal (ECS) channel, whose structure and use are defined in ITU-T Rec. H.233.This revision of the Recommendation improves the overall readability of the text, removes ambiguities of certain aspects related to the exchange of asymmetric length of keys, and removes references to MLP encryption according to T.120-series Recommendations, since this effort is for further study. References to ASN.1 were also updated to the newest version of its specification. |
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| Citation: |
https://handle.itu.int/11.1002/1000/6162 |
| Series title: |
H series: Audiovisual and multimedia systems
H.200-H.499: Infrastructure of audiovisual services
H.230-H.239: Systems aspects |
| Approval date: |
2002-11-29 |
| Provisional name: | H.KEY |
| Approval process: | AAP |
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Status: |
In force |
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Maintenance responsibility: |
ITU-T Study Group 16 |
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Further details: |
Patent statement(s)
Development history
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ITU-T Supplement
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Title
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Status
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Summary
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Table of contents
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Download
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H Suppl. 6 (04/2006)
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Control load quantum for decomposed gateways
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In force
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here
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here
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here
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H Suppl. 9 (05/2008)
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Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)
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In force
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here
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here
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here
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H Suppl. 11 (02/2009)
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Analysis of class-based home network QoS solutions
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In force
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here
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here
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here
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H Suppl. 12 (11/2013)
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Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways
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In force
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here
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here
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here
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H Suppl. 13 (10/2015)
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Gateway control protocol: Common ITU-T H.248 terminology - Release 2
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In force
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here
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here
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here
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H Suppl. 14 (10/2015)
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Gateway control protocol: SDP codepoints for gateway control - Release 2
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In force
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here
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here
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here
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H Suppl. 15 (01/2017)
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Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics
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In force
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here
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here
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here
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H Suppl. 17 (11/2014)
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Guide for addressing accessibility in standards
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In force
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here
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here
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here
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H Suppl. 18 (10/2017)
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Signalling, backward compatibility and display adaptation for HDR/WCG video coding
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In force
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here
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here
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here
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H Suppl. 19 (04/2021)
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Usage of video signal type code points
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In force
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here
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here
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here
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| Title |
Approved on |
Download |
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Testing of personal audio systems for compliance with ITU-T H.870 (2018)
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2021
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here
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Security in Telecommunications and Information Technology
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2015
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here
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Security in Telecommunications and Information Technology
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2011
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here
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Security in Telecommunications and Information Technology
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2009
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here
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Telecommunications Accessibility Checklist
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2006
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here
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Security in Telecommunications and Information Technology
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2004
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here
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Security in Telecommunications and Information Technology
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2003
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here
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