We describe a software self-checking mechanism designed to improve the tamper resistance of large programs. The mechanism consists of a number of testers that redundantly test for changes in the executable code as it is running and report modifications. The mechanism is built to be compatible with copy-specific static watermarking and other tamper-resistance techniques. The mechanism includes s...

An efficient fragile image watermarking technique for pixel level tamper detection and resistance is proposed. It uses five most significant bits of the pixels to generate watermark bits and embeds them in the three least significant bits. The proposed technique uses a logistic map and takes advantage of its sensitivity property to a small change in the initial condition. At the same time, it i...

Repositories of motion captured (MoCap) data can be reused for human motion analysis in physical medicine, biomechanics and animation related entertainment industry. MoCap data expressed as a matrix Mm x n can be subject to tampering from shuffling of its elements or change in element values due to motion editing operations. Tampering of archived motion data intentionally or due to machine/huma...

For enhancing the protection level of dynamic graph software watermarks and for the purpose of conducting the analysis which evaluates the effect of integrating two software protection techniques such as software watermarking and tamper-proofing, constant encoding technique along with the enhancement through the idea of constant splitting is proposed. In this paper Thomborson technique has been...

Code modification is the main method for software piracy. Making software tamper resistant is the challenge for software protection. In this paper, we present and explore a methodology that we believe can protect program integrity in a more tamper-resilient and flexible manner. we describe a dynamic integrity verification mechanism designed to prevent modification of software. The mechanism mak...

Common software-protection systems attempt to detect malicious observation and modification of protected applications. Upon tamper detection, anti-hacking code may produce a crash or gradual failure, rendering the application unusable or troublesome. Such a response is designed to complicate attacks, but has also caused problems for developers and end users, particularly when bugs or other prob...

Fuzzy identity-based encryption (FIBE) has found many applications, such as biometric-based encryption, since its notion was firstly proposed by Sahai and Waters [15]. In this paper, we show how to minimize the damage of secret key exposure in FIBE. We introduce a new notion which we call fuzzy identity-based key-insulated encryption (FIBKIE). In FIB-KIE, the secret key associated with an ident...

An important and recurring security scenario involves the need to carry out trusted computations in the context of untrusted environments. It is shown how a tamper-resistant interpreter for a programming language – currently Lisp 1.5 – combined with the use of a secure co-processor can address this problem. This solution executes the interpreter on the secure coprocessor while the code and data...