Power Analysis has been intensively studied since the first publications in 1996 and many related attacks on naive implementations have been proposed. Nowadays algorithms in tamper resistant devices are protected by different countermeasures most often based on data randomization such as the BRIP algorithm on ECC and its RSA derivative. However not all of them are really secure or in the best c...

Recent industrial efforts in architectural and system support for trusted computing still leave systems wide-open even to relatively simple and inexpensive hardware-based attacks. These attacks attempt to snoop or modify data transfer between various chips in a computer system such as between the processor and memory, and between processors in a multiprocessor interconnect network. Software sec...

Tampering attacks are cryptanalytic attacks on the implementation of cryptographic algorithms (e.g., smart cards), where an adversary introduces faults with the hope that the tampered device will reveal secret information. Inspired by the work of Ishai et al. [Eurocrypt’06], we propose a compiler that transforms any circuit into a new circuit with the same functionality, but which is resilient ...

Software security to protect mobile agent consists of lots of aspects like cryptography, access control and trust management, intrusion detection and tamper resistance, authentication and privacy, signature schemes, e-commerce, security analysis, mobile computing security etc. So, to design and develop security mechanisms for mobile agents against malicious hosts this paper identifies different...

A hybrid watermark that consists of a robust part and a fragile part can be used to serve multiple purposes. The robust part can protect copyright information, the fragile part can detect tampering, and their combination enables identification of attacks encountered. This paper analyses an overlap and a non-overlap implementation of the robust and fragile parts in a hybrid system. The differenc...

Wireless sensor networks are commonly used for critical security tasks such as intrusion or tamper detection, and therefore must be protected. To date, security of these networks relies mostly on key establishment and routing protocols. We present a new approach to key establishment, which combines a group-based distribution model and identity-based cryptography. Using this solution enables sen...

We present an independent security evaluation of the AccuVote Optical Scan voting terminal (AV-OS). We identify a number of new vulnerabilities of this system which, if exploited maliciously, can invalidate the results of an election process utilizing the terminal. Furthermore, based on our findings an AV-OS can be compromised with off-the-shelf equipment in a matter of minutes even if the mach...

We analyse a recent image authentication scheme designed by Chang et al. [Chang, C.-C., Hu, Y.-S., Lu, T.-C., 2006, A watermarkingbased image ownership and tampering authentication scheme. Pattern Recognition Letters. 27, 439-446] whose first step is based on a watermarking scheme of Maniccam and Bourbakis [Maniccam, S.S., Bourbakis, N., 2004, Lossless compression and information hiding in imag...

Information hiding is an emerging research area which includes applications such as copyright management [4], tamper detection and content authentication. Existing chaos optimization and random position selection based watermarking embedding methods make claims for robustness and reversibility; however, reversibility becomes questionable when data capacity is high. In a published paper, authors...