In this paper, a novel semi-fragile authentication scheme based on block-mean quantization in the wavelet domain is proposed for image authentication. The scheme is composed of a structural digital signature process and a semi-fragile watermarking/ fingerprinting algorithm. In the signature process, the invariants are extracted as authentication codes from the quantization relationships and hierarchy information of discrete wavelet decomposition. The authentication codes consist of inter-block and intra-block codes in order to detect and localize tampering. The semi-fragile fingerprinting algorithm is intended to embed the signature via the use of block-mean quantization. The proposed scheme can effectively detect and localize the malicious modification while tolerating lossy compression.
|Title of host publication||Proceedings - IAS 2007 3rd Internationl Symposium on Information Assurance and Security|
|Number of pages||6|
|Publication status||Published - 2007|
|Event||3rd Internationl Symposium on Information Assurance and Security, IAS 2007 - Manchester, United Kingdom|
Duration: 20 Aug 2007 → 31 Aug 2007
|Conference||3rd Internationl Symposium on Information Assurance and Security, IAS 2007|
|Period||20/08/07 → 31/08/07|