On the Security of Multiple Encryption or CCA-security+CCA-security=CCA-security?

Abstract

In a practical system, a message is often encrypted more than once by different encryptions, here called multiple encryption, to enhance its security. Additionally, new features may be achieved by multiple encrypting a message, such as the key-insulated cryptosystems and anonymous channels. Intuitively, a multiple encryption should remain “secure”, whenever… (More)
DOI: 10.1007/978-3-540-24632-9_26

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