Patent ID: 7058178
Filing Date: 2006-06-06
Classification: H04L

Abstract:
1. An encryptor and/or decryptor station comprising: an input for receiving a stream of encrypted, respectively, decrypted data items in synchronization with a clock trigger; a data-stream generator for in response to the clock trigger generating a stream of generated data items; and means for combining the received stream of encrypted, respectively, decrypted data items with the stream of generated data items providing a stream of decrypted, respectively, encrypted data items; the data-stream generator comprising: a plurality of subgenerators M means for combining a generated data item of each of the subgenerators Mi, forming the output data item of the data-stream generator; a control subgenerator C comprising an input for receiving the clock trigger and an output; the control subgenerator C being operative to generate a control data item of at least one bit on the output in response to the clock trigger; and control means operative to provide a trigger to at least one of the clock inputs of the subgenerators M characterised in that: the control means comprises for at least one subgenerator M