E for cryptography U1

Egyptians have a very long history of cryptography.

• True

• False

• NI

A ciphertext is the text that contains unprocessed readable information.

• True

• False

• NI

Communication with secrete codes was rarely required for diplomatic, during war, individual or corporate privacy.

• True

• False

• NI

Knowing the key, it should be possible to reserve the encryption process and save the time.

• True

• False

• NI

Breaking or cracking a cipher is considered decryption without key

• True

• False

• NI

One of the functions of a cryptanalytic attack us exploiting weakness in the algorithm or crypto device itself.

• True

• False

• NI

There is one type of attacks in a cryptanalytic attack.

• True

• False

• NI

The key is known only to those who are not authorised to read the information.

• True

• False

• NI

The ciphertext-only attack is the attack in which the cryptanalyst has access to both ciphertext and its corresponding plaintext or assumed plaintext, to retrieve the corresponding key.

• True

• False

• NI

A combination of fractioning, transposition and substitution is often used in cryptography to manipulate the information.

• True

• False

• NI