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ETSI Special Committee (SC) TSA (TETRA Security Algorithm)

Approved at Board #134, Sep 2021

1. Responsibility

  • The TETRA Security Algorithm Special Committee is responsible for creating reports (containing confidential specifications), draft ETSI deliverables in the area of additional TETRA cryptographic algorithms and protocols specific to fraud prevention/unauthorized access to TETRA networks and user data privacy. 
  • SC TSA will be restricted to developing only the encryption algorithms TEA5, 6 and 7 and the authentication algorithm set TAA2.   SC TSA provides a service to ETSI TC TCCE. All work done by SC TSA shall be sponsored by ETSI TC TCCE, with the agreement of the ETSI Board. The full requirements (target dates, commercial objectivities etc.) are defined by the sponsoring Technical Body and variation requires the agreement of the sponsoring Technical Body. 
  • TC TCCE is responsible for obtaining the agreement of the ETSI Board for inclusion of items in the ETSI Work Programme that are to be carried out by SC TSA.   The objectives set by TC TCCE shall define the level of confidentiality of the resulting output of SC TSA. The output shall be “Confidential". The Confidential output is passed to the Director-General and released to those having need of the information, after first having received a written confidentiality undertaking.  The composition of SC TSA shall be established by the ETSI Board upon a proposal put before it by the Board Chairman in consultation with the Director-General.  On completion of the work items relating to the development of the encryption algorithms TEA5,6 and 7 and authentication algorithm set TAA2, SC TSA will be made dormant.