Threshold Encryption into Multiple Ciphertexts

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Threshold Encryption into Multiple Ciphertexts
We propose (T, N) multi-ciphertext scheme for symmetric encryption. The scheme encrypts a message into N distinct ciphertexts. The knowledge of the symmetric key allows decryption of the original message from any ciphertext. Moreover, knowing T + 1 ciphertexts allows efficient recovery of the original message without the key, and without revealing the key as well. We define the security property of the scheme, and prove the security of the proposed scheme. We discuss several variants of the basic scheme that provides additional authenticity and efficiency.
Martin Stanek
Added 23 Dec 2011
Updated 23 Dec 2011
Type Journal
Year 2011
Where IACR
Authors Martin Stanek
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