Volume 4, Issue 1, Spring 2012, Page 1-12


Crypto-Compression System for Secure Transfer of Grayscale Images

Hameed Abdul-Kareem Younis

Journal of Al-Qadisiyah for Computer Science and Mathematics, Volume 4, Issue 1, Pages 1-12

In this paper, the proposed partial encryption algorithm adopts secure encryption algorithm to encrypt only one part of the compressed data. Only 0.0031% of the original data is encrypted. This leads to reduction both encryption and decryption time.
Thus, a combination of encryption and compression is used in practical work. In the compression step, the advanced wavelet coding scheme, the Set Partition in Hierarchical Trees (SPIHT) algorithm is used while in the encryption step, stream cipher is applied.
The proposed partial encryption scheme is fast and secure; moreover, it never reduces the compression performance of the underlying selected compression method.