Release ledger
Canonical Atlas record
TS 55.226
3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS
Responsible WGS3
StatusUnder change control
Initial releaseRel-6
Selected releaseRel-20
Latest indexed version19.0.0
Series55
TypeTS
Release evolution
Compare evidence between releases
Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Rel-20 snapshot
Work affecting this release
0 indexed Change Requests · 0 connected Work Items.
Showing 0 CR records from the available cross-release sample. Browse release CR records (JSON) →
Version history
Indexed versions
Showing 14 of 14 indexed versions.
19.0.0Rel-19SA#1092025-10-15
18.0.0Rel-18SA#1032024-04-03
17.0.0Rel-17SA#95-e2022-03-30
16.0.0Rel-16SA#88-e2020-07-10
15.0.0Rel-15SA#812018-10-23
14.0.0Rel-14SA#752017-03-28
13.0.0Rel-13SA#702016-01-12
12.0.0Rel-12SA#652014-09-29
11.0.0Rel-11SA#572012-09-27
10.0.0Rel-10SA#512011-04-06
9.0.0Rel-9SA#452011-02-03
0.1.0Rel-6 · pre-approval-2006-01-30
1.0.0Rel-6 · pre-approvalSA#232004-03-22
2.0.0Rel-9 · pre-approvalSA#45—
Atlas classifications
Meaning and provenance
No Atlas classifications have been attached yet.
Work Items
Standards work connected to TS 55.226
SEC16
Rel-6historical linkRel-6 Security enhancements
Historical association · verification pendingA5/4-GEA4
Rel-9historical linkSA3 part of 128 bit encryption for GSM and GPRS
Historical association · verification pendingKnowledge graph
Related standards
No graph edges indexed yet. The graph API is available at this JSON endpoint.