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Tzong-Sun Wu, Han-Yu Lin and Pei-Yih Ting A publicly verifiable PCAE scheme for confidential applications with proxy delegation Transactions on Emerging Telecommunications Technologies 23

Version of Record online: 5 DEC 2011 | DOI: 10.1002/ett.1522

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We propose a bilinear pairing-based proxy convertible authenticated encryption scheme and its message-linkage variant. Our schemes allow a delegated proxy signer to generate an authenticated ciphertext on behalf of an original signer and only a designated recipient is able to decrypt the ciphertext and verify the proxy signature. Additionally, the indistinguishability under adaptive chosen-ciphertext attacks and the existential forgery under adaptive chosen-message attacks security of the proposed schemes are proved in random oracle models.

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