What is data encryption standard (DES)?
2018
What is data encryption standard (DES)?
Answer: A. Block cipher — This is the accurate classification. A block cipher takes a fixed-length block of plaintext (in the case of DES, exactly 64 bits) and transforms it into a…
- A.
Block cipher
- B.
Stream cipher
- C.
Bit cipher
- D.
None of the above
Attempted by 666 students.
Show answer & explanation
Correct answer: A
This is the accurate classification. A block cipher takes a fixed-length block of plaintext (in the case of DES, exactly 64 bits) and transforms it into a ciphertext block of the same size using a secret key. It processes the data in chunks rather than as a continuous stream.
Loading lesson…