libdvbcsa is a free implementation of the DVB Common Scrambling Algorithm with encryption and decryption capabilities. It comes in two flavors: a classical single packet implementation and a faster parallel bitslice implementation. The parallel implementation can take advantages of MMX, SSE, or Altivec instruction sets. The parallel implementation can process MPEG TS packets at 300Mbps or more on recent processors. It has been successfully tested on processors with different word widths and endianess.
