We analyze and discuss encryption schemes for JPEG2000 based on the wavelet packet transform with a keydependent\r\nsubband structure. These schemes have been assumed to reduce the runtime complexity of encryption\r\nand compression. In addition to this ââ?¬Å?lightweightââ?¬Â nature, other advantages like encrypted domain signal\r\nprocessing have been reported. We systematically analyze encryption approaches based on key-dependent\r\nsubband structures in terms of their impact on compression performance, their computational complexity and the\r\nlevel of security they provide as compared to more classical techniques. Furthermore, we analyze the prerequisites\r\nand settings in which the previously reported advantages actually hold and in which settings no advantages can\r\nbe observed. As a final outcome it has to be stated that the compression integrated encryption approach based\r\non the idea of secret wavelet packets can not be recommended.
Loading....