A course in number theory and cryptography
A course in number theory and cryptography
Paillier's cryptosystem revisited
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
Cryptography: Theory and Practice
Cryptography: Theory and Practice
Zero-Knowledge Watermark Detection and Proof of Ownership
IHW '01 Proceedings of the 4th International Workshop on Information Hiding
Security of Public Watermarking Schemes for Binary Sequences
IH '02 Revised Papers from the 5th International Workshop on Information Hiding
Proceedings of the 2004 workshop on Multimedia and security
Cryptographic methods in multimedia identification and authentication
Cryptographic methods in multimedia identification and authentication
Remote timing attacks are practical
SSYM'03 Proceedings of the 12th conference on USENIX Security Symposium - Volume 12
Public-key cryptosystems based on composite degree residuosity classes
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
IEEE Transactions on Information Theory
Protection and retrieval of encrypted multimedia content: when cryptography meets signal processing
EURASIP Journal on Information Security
Secure quantization index modulation watermark detection
IWDW'06 Proceedings of the 5th international conference on Digital Watermarking
| Hi-index | 0.00 |
We present a semi-public key implementation of quantization index modulation (QIM) watermarking called Secure QIM (SQIM). Given a signal, a watermark detector can learn the presence of an SQIM watermark without learning anything anything else from the detection process. The watermark detector first transforms the signal with a secret transform, unknown to the detector, and then quantizes the transform coefficients with secret quantizers, also unknown to the detector. This is done with the use of homomorphic cryptosystems, where calculations are performed in an encrypted domain. A low-power, trusted, secure module is used at the end of the process and reveals only if the signal was watermarked or not. Even after repeated watermark detections, no more information is revealed than the watermarked status of the signals. The methods we present are for watermark systems with quantizers of stepsize 2.