Self Synchronizing Digital Scramblers
Benjamin Arazi · IRE Transactions on Communications Systems · 1977
A known way of scrambling binary data for security purposes is by adding to it, bit by bit, a pseudorandom sequence A. Synchronization is established by providing the descrambler with the states of A's generator. It is shown here how for data transmitted in blocks, the states of the generator can be recovered at any instant which enables self-synchronization. If the block length iskand the generator of A consists of ann-stage register, there is a delay ofk(n - 1) + 1bits, between sync lost and sync recovery.