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Secure and reliable authentication is an essential prerequisite for many online systems, yet achieving this in a way which is acceptable to customers remains a challenge. GrIDsure, a one-time PIN scheme using random grids and personal patterns, has been proposed as a way to overcome some of these challenges. We present an analytical study which demonstrates that GrIDsure in its current form is vulnerable...
This paper introduces FORTUNA, a probabilistic framework that supports the conception and early design stages of hardware-based secure systems. FORTUNA can point out potential weaknesses of complex systems, involving physical and logical attacks, basic human interaction or even a few classes of unknown threats. FORTUNA consists of two main elements: a) a logical-probabilistic theoretic model in which...
In this paper, we propose a family of light-weight provably-secure authentication protocols called the RCHB family, which is a variant of the HB protocol. The HB protocol uses the complexity of decoding linear codes for security against passive attacks. The security for the RCHB protocol family to passive attacks is enhanced by the introduction of both the rotation and complement on the secret key...
The term malware is coined to name any software with malicious intentions. One of the methods malware writers use for hiding their creations is executable packing. Packing consists of encrypting or hiding the real code of the executable in such a way that it is decrypted or unhidden in its execution. Widespread solutions to this issue first try to identify the packer used and next apply the corresponding...
There is no widely accepted way of measuring the level of security of a recognition-based graphical password against guessing attacks. We aim to address this by examining the influence of predictability of user choice on the guessability and proposing a new measure of guessability. Davis et al. showed that these biases exist for schemes using faces and stories, we support this result and show these...
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