Comprehensive and Detailed Explanation From CEH v13 Guide Topics:
The correct answer is A. hashing algorithms. In information security and cryptography, hashing algorithms are specifically designed to provide data integrity. A hash function takes an input message, file, or data block and produces a fixed-length value known as a hash, message digest, or checksum. If even a single bit of the original data changes, the resulting hash value changes significantly, making unauthorized modifications easy to detect.
Common cryptographic hash algorithms include SHA-256, SHA-384, and SHA-512. These algorithms are widely used to verify the integrity of files, software downloads, digital documents, emails, and transmitted network data. During verification, the recipient calculates the hash of the received data and compares it to the original hash value. If the values match, the data has maintained its integrity.
Option B is incorrect because “integrity algorithms” is not a standard cryptographic algorithm category. Option C (symmetric algorithms) such as AES and DES primarily provide confidentiality through encryption, while Option D (asymmetric algorithms) such as RSA and ECC are mainly used for encryption, key exchange, authentication, and digital signatures. Although digital signatures can support integrity verification, the fundamental mechanism used to detect changes in data is the cryptographic hash function. Therefore, hashing algorithms are the best answer for guaranteeing message integrity.
