This Recommendation defines the two independent technical solutions which may be used in the context of secure facsimile transmission. The two technical solutions are based upon the HKM/HFX40 algorithms and the RSA algorithm.
Annex A contains information regarding the HKM/HFX40 algorithms.
Annex B contains information regarding the RSA algorithm.
Annex C describes the use of the HKM system to provide secure key management capabilities for facsimile terminals. The provision of the capabilities is described in terms of two main procedures:
– the procedure for one way registration between entities X and Y (procREGxy); and
– the procedure for the secure transmission of a secret key between entities X and Y (procSTKxy).
Annex D covers the procedures for the use of the HFX40 carrier cipher system to provide message confidentiality for facsimile terminals.
Annex E describes the HFX40-I hashing algorithm, in terms of its use, the necessary calculations and the information to be exchanged between the facsimile terminals to provide integrity for a transmitted facsimile message as either a selected or pre‑programmed alternative to the encryption of the message.