Encoder, decoder and methods employing partial data encryption

摘要

A method of compressing and encrypting input data to generate corresponding compressed and encrypted data is provided. The input data is compressed to generate intermediate compressed data streams. The intermediate streams include at least one critical data stream that is critical and essential for subsequent decompression of one or more of the remaining intermediate streams. The at least one critical data stream is encrypted using one or more encryption algorithms to generate at least one intermediate encrypted data stream. Subsequently, unencrypted portions of the intermediate compressed data streams are merged together with the at least one intermediate encrypted data stream to generate the compressed and encrypted data.