Which of the following is not a purpose of Cryptography ?ConfidentialityIntegrityAuthorizationNon-repudiation

Answer

To determine which option is not a purpose of cryptography, we can analyze the typical functions of cryptography:

1. Confidentiality: Cryptography is widely used to secure information by making it accessible only to intended recipients, thereby ensuring confidentiality.

2. Integrity: Cryptography provides assurance that information has not been altered during transmission or storage. Techniques such as hashing are used to verify data integrity.

3. Authorization: This typically refers to the process of granting or denying access to a resource, which does not directly relate to the cryptographic functions. While cryptography can support authentication (verifying identity) which may lead to authorization processes, authorization itself is not a primary purpose of cryptography.

4. Non-repudiation: Cryptographic techniques, especially digital signatures, ensure that a sender cannot deny having sent a message, supporting non-repudiation.

Based on this analysis, the answer is: Authorization is not a purpose of cryptography.