Victor K.-W. Wei

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Error control codes are widely used to increase the reliability of transmission of information over various forms of communications channels. The Hamming weight of a codeword is the number of nonzero entries in the word; the weights of the words in a linear code determine the error-correcting capacity of the code. The rth generalized Hamming weight for a(More)
We present a linkable spontaneously anonymous group (LSAG) signature scheme (alternatively known as linkable ring signature scheme) satisfying the following three properties. (1) Anonymity, or signer indistinguishability. (2) Linkability: That two signatures by the same signer can be linked. (3) Spontaneity: No group secret, therefore no group manager or(More)
We present the first group signature scheme with provable security and signature size O(λ) bits where the group manager, the group members, and the Open Authority (OA) are all identity-based. We use the security model of Bellare, Shi, and Zhang [3], except to add three identity managers for manager, members, and OA respectively, and we discard the Open(More)
A NNEAL, as defined in Webster’s New Collegiate Dictionary, means: 1) to heat (as glass) in order to fix laid-on colors, and 2) to heat and then cool (as steel or glass) usually for softening and making less brittle. The cooling stage of annealing is usually done slowly to reduce the number of defects in the crystal structure (as steel) and to minimize the(More)
A ring signature scheme can be viewed as a group signature scheme with no anonymity revocation and with simple group setup. A linkable ring signature (LRS) scheme additionally allows anyone to determine if two ring signatures have been signed by the same group member. Recently, Dodis et al. [19] gave a short (constant-sized) ring signature scheme. We extend(More)