FED-STD-1028 Telecommunications: Interoperability And Security Requirements For Use Of The Data Encryption Standard With Ccitt Group 3 Facsimile EquipmentThis standard specifies interoperability and security related requirements for the use of encryption with CCITT i.e., International Telegraph and Telephone Consultative Committee\) Group 3-type facsimile equipment. The algorithm used for encryption is the Data Encryption Standard \(DES\), described in Federal Information Processing Standards Publication 46. Requirements contained in section 3 below relate to the interoperation of DES Cryptographic Equipment, or their operation with associated CCITT Group 3 facsimile equipment. Additional security requirements, not directly relating to interoperability, are contained in Federal Standard 1027.