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The notion of Visual Cryptography was first introduced by Naor and Shamir in 1994 [NS94]. Here “visual” means that the decryption is done by human eyes instead of by any computing devices. To retrieve the ciphertext, simply stack the encrypted images together. In fact, it is more like an image secret sharing scheme than an encryption scheme. Both the secret and the shares are black-and-white pictures,...
Key establishment in sensor networks is a challenging problem for the constrained energy, memory, and computational capabilities of the sensor nodes. In this paper, focusing on the management of encryption keys in clustered WSNs, We propose a novel distributed key management scheme based on Shamir secret sharing scheme and deployment knowledge(KMSGC). In KMSGC, the sensor nodes are divided into some...
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