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There is a TinySec in TinyOS to provide integrity and confidentiality in wireless sensor network (WSN). However, the TinySec is operated based on simple group key management; this is not enough to ensure sensor node security. Accordingly, we propose a new access control methodology using task-role based access control (T-RBAC) which has been successfully applied to many different kinds of security...
A Diffie-Hellman public-key cryptography based on chaotic attractors of neural networks is described in the paper. There is a one-way function between chaotic attractors and initial states in an overstoraged Hopfield neural network (OHNN). If the synaptic matrix of OHNN is changed, each attractor and its corresponding domain of initial state attraction is changed. Then, we regard the neural synaptic...
In this paper, on the basis of counter mode and output feedback mode, a novel block cipher mode of operation - COFB was proposed. In the new scheme, a nonce N was used. The novel mode solves the synchronization question of CTR mode by the nonce and the circular question of OFB mode by xoring a random value. The new scheme is provable secure if the underlying block cipher is a pseudorandom permutation
A stream cipher namely the HSC (hashing stream cipher) which uses a regular one-way hash function to generate pseudorandom keystream iteratively is proposed. Since the timestamp is used in the keystream generator, the algorithm achieves the robustness against the adaptive-chosen-plaintext attack. The oneway hash function is the core of the algorithm, so the security analysis of the algorithm is shifted...
Blind signature allows a user to obtain signatures from an authority on any document, in such a way that the authority learns nothing about the message that is being signed. The blindness is an important property which distinguishes the blind signature from other signature schemes. In this paper, we analyze security of two ID-based blind signature schemes (Huang et al., 2005; Zhang and Kim, 2002)...
We develop a new formalism for the security analysis of business logic. Our formalism can be applied to business logic in its early design stages, after the implementation is complete, or at any intermediate time. We illustrate the use of our formalism in a case study based on an initial design for a B2B e-payment system. Our analysis successfully identifies an operational risk for the trusted intermediate...
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