This type of attack is generally most applicable to public-key cryptosystems, what type of attack am I ?

The correct answer is A. Chosen-Ciphertext attack. A Chosen-Ciphertext Attack (CCA) is most applicable to public-key (asymmetric) cryptosystems. In this attack, the adversary selects arbitrary ciphertexts, submits them to a decryption oracle, and analyzes the resulting plaintexts to deduce the private key or recover encrypted…

Submitted by daniela_cl· Apr 18, 2026Cryptography

Question

Options

AChosen-Ciphertext attack
BCiphertext-only attack
CPlaintext Only Attack
DAdaptive-Chosen-Plaintext attack

How the community answered

(28 responses)

A
96% (27)
B
4% (1)

Explanation

A Chosen-Ciphertext Attack (CCA) is most applicable to public-key (asymmetric) cryptosystems. In this attack, the adversary selects arbitrary ciphertexts, submits them to a decryption oracle, and analyzes the resulting plaintexts to deduce the private key or recover encrypted data. Public-key systems are especially vulnerable because the public key is openly available, allowing an attacker to craft ciphertexts at will. RSA without proper padding (like PKCS#1 v1.5 or OAEP) is a classic example of a system vulnerable to CCA. Ciphertext-only and plaintext attacks differ in what information the attacker already possesses.

Topics

#Cryptography#Cryptanalytic attacks#Chosen-ciphertext attack#Public-key cryptography

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