Secure communications system comprising a mobile encryption/decryption unit, a fixed communications unit and a clip-on module attachable to the mobile encryption/decryption unit

摘要

A secure communications system (100, 200) comprising a detachable security module (140) and a stationary communications unit (120) is disclosed. The detachable security module comprises encryption means (160), and is connectable to the stationary unit for receiving encrypted data and delivering decrypted data, and/or receiving clear data and delivering encrypted data. In addition, the detachable security module (140) is a mobile stand-alone encryption/decryption communications unit (140) provided with its own user interface (141) and access point interface (143) for use as a secure mobile communications unit (140) when disconnected from the stationary unit (120). A mobile encryption/decryption communications unit and a stationary unit for use in such a secure communications system are also disclosed, as well as a clip-on unit for use with the mobile unit.