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Nalla and Reddy proposes ID-based tripartite authenticated key agreement protocols from Weil pairing. Security analysis on passive attack for Nalla-Reddy's ID-AK-2 and ID-AK-3 protocols is proposed in this paper and the protocols are proved to be not secure on passive attack.
This paper introduces a new (t, n) secret sharing scheme for image encryption. The proposed method encrypts the secret image into two images as the same size of the original image, which one is the public image (called the encrypted image) and another is to be shared among n participants using a new secret sharing method based on the Shamir’s secret sharing. In the new secret sharing scheme, t (or...
Kocarev gave the first cryptosystems based on the semi-group property of Chebyshev polynomials, which seemed excellent but actually insecure. Due to the inherent periodicity of trigonometric function, an attack can easily get plaintext given ciphertext. In this paper, we extend Chebyshev polynomials from real number to finite fields to avoid the attack and present the corresponding key exchange scheme,...
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