An encoder for compressing data is described, including a history buffer having multiple storage locations for storing target data units. The encoder is configured to input a target data string including multiple target data units, and additional data (e.g., security data associated with the target data...http://www.google.es/patents/US6771193?utm_source=gb-gplus-sharePatente US6771193 - System and methods for embedding additional data in compressed data streams
System and methods for embedding additional data in compressed data streams
