| 摘要 |
Ciphering device for a flow of data bits to be ciphered, comprising a data input (10) for said flow, and a data output (11) for a ciphered flow of data bits, and a mixing unit (13), a first input thereof being connected to said data input (10), an output thereof being connected to said data output (11), and a second input being connected to a code unit (14) for generating code bits, said code unit (14) being operatively connected to said data output (11) and comprising at least one memory (16) including code bits, an output of said memory being operatively connected to said mixing unit (13). An address generating unit (17) is operatively connected to said memory (16) to address said memory, and a pseudo-random generator (18) is operatively connected to a data input of said memory (16) for generating code bits on the basis of a starting value and for transfering code bits to said memory (16) at any address specified by said address generating unit (17). |
