Adaptive chosen-ciphertext attack

An adaptive chosen-ciphertext attack is a type of cryptographic attack where the attacker can select a ciphertext based on previously obtained plaintexts. In this form of attack, the attacker chooses a ciphertext that is decrypted, analyzes the resulting plaintext, and then selects another ciphertext based on the results of the previous decryption. This type of attack is considered adaptive because the attacker can adjust their strategy based on the information they gain from previous decryption attempts.From: Security in RFID and Sensor Networks [2019], Data-driven Block Ciphers for Fast Telecommunication Systems [2019]

Public-Key Encryption

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Published in Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone, Handbook of Applied Cryptography, 2018

Alfred J. Menezes, Paul C. van Oorschot, Scott A. Vanstone

In other words, the ciphertext corresponding to the plaintext m = m1m2 mod n is c = c1c2 mod n; this is sometimes referred to as the homomorphic property of RSA. This observation leads to the following adaptive chosen-ciphertext attack on RSA encryption.

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Published in International Journal of Computers and Applications, 2020

Chunhua Jin, Guanhua Chen, Changhui Yu, Jianyang Zhao

can easily find out from list or list . It means that can solve the CDH problem by interacting with . We assume that the CDH problem is hard, so there is no efficient algorithm that can solve the CDH problem. Thus, the adversary does not exist and our scheme is secure against adaptive chosen ciphertext attack.

Adaptive chosen-ciphertext attack

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Deniable authenticated encryption for e-mail applications