Partial Encryption of Compressed Image Using Threshold Quantization and AES Cipher
Hameed A. Younis, Abdulkareem Younis Abdalla, Turki Younis Abdalla · Iraqi Journal for Electrical And Electronic Engineering · 2012
Cryptography is one of the technological means to provide security to data beingtransmitted on information and communication systems.When it is necessary to securelytransmit data in limited bandwidth, both compression and encryption must be performed.Researchers have combined compression and encryption together to reduce the overallprocessing time.In this paper, new partial encryption schemes are proposed to encrypt only part of thecompressed image.Soft and hard threshold compression methods are used in thecompressionstep and the Advanced Encryption Standard (AES) cipher is used forthe encryption step. The effect of different threshold values on the performance of the proposed schemes are studied. The proposed partial encryption schemes are fast, secure, and do not reduce the compression performance of the underlying selected compression methods.