| 摘要 |
<p>A processor for producing an encryption keystream to encrypt information to be communicated from a first location to a second location, the processor comprising a keystream generator operable to generate a keystream; and a divider operable to divide the keystream into equally sized blocks each of which is to be allocated to encryption or decryption or synchronisation or includes a portion to be discarded, and wherein each of the blocks is sub-divided into portions which are to be allocated to encryption or decryption, synchronisation or discarding and wherein each block includes a plurality of encryption or decryption portions and only a single synchronisation portion.</p> |
