An suggested Algorithm For partial Encryption of Compressed Images

The use of image communication has increased in recent years. When it is necessary to securely transmit data in limited bandwidth, both compression and encryption must be performed. Researchers have combined compression and encryption together to reduce the overall processing time. In this paper, new selective encryption is proposed, in which a secure encryption algorithm is used to encrypt only part of the compressed data. Only 0.0244% of the original data is encrypted, resulting in a significant reduction in encryption and decryption time. In the compression step, the advanced wavelet coding scheme, the Set Partition in Hierarchical Trees (SPIHT) algorithm is used. In the encryption step, transposition cipher is applied. The proposed selective encryption scheme is fast, secure, and do not reduce the compression performance of the underlying selected compression method