Exam SY0-701 topic 1 question 523 discussion

. Encryption replaces cleartext with ciphertext, while hashing calculates a checksum. Explanation: ✔ Encryption converts plaintext into ciphertext using an algorithm and a key, allowing data to be decrypted when needed. ✔ Hashing generates a fixed-length checksum (hash) from input data, ensuring data integrity but not reversibility (i.e., hashes cannot be decrypted). Why not the other options? A. Encryption protects data in transit, while hashing protects data at rest. ❌ Incorrect – Encryption protects both data in transit and at rest, while hashing is used for data integrity verification, not storage security. C. Encryption ensures data integrity, while hashing ensures data confidentiality. ❌ Incorrect – Encryption ensures confidentiality, and hashing ensures integrity, not the other way around. D. Encryption uses a public-key exchange, while hashing uses a private key. ❌ Incorrect – Hashing does not use any keys. Public-key exchange applies only to asymmetric encryption, not encryption as a whole.

Encrypted data hackers cannot understand, but hackers can alter the data. That's to say it ensures confidentiality but not integrity. Encryption works with both data in transit and rest. Encryption uses a public key (SSL), a private key (Asymetric), and a symmetric key (AES). But Hash does not need any keys. Just the specific length of the hash.