Practical Approaches to Attaining Security Against Adaptively Chosen Ciphertext Attacks (Extended Abstract)

  title={Practical Approaches to Attaining Security Against Adaptively Chosen Ciphertext Attacks (Extended Abstract)},
  author={Yuliang Zheng and Jennifer Seberry},
This paper presents three mcthods for strengthening public key cryptosystems in such a way t,hat they become secure against adaptiuely chosen ciphertext attacks. In an adaptively chosen ciphertext a t tack, an attacker can query the deciphering algorithm with any ciphertexts, ezcept for t h e exact object ciphertext to becryptanalyzed. The first strengthening method is based on the use of one-way hash functions, the second on the use of universal hash functions and the third on the use of… CONTINUE READING
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