| Exam Code/Number: | 212-81Join the discussion |
| Exam Name: | Certified Encryption Specialist |
| Certification: | EC-COUNCIL |
| Question Number: | 208 |
| Publish Date: | Sep 16, 2026 |
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Network of trusted certificate authority servers. Use asymmetric key pairs and combines software, encryption and services to provide a means of protecting security of business communication and transactions.
The mode makes a block cipher into a synchronous stream cipher. It generates keystream blocks, which are then XORed with the plaintext blocks to get the ciphertext.
Which of the following is not a key size used by AES?
What is the name of the attack where the attacker obtains the ciphertexts corresponding to a set of plaintexts of his own choosing?
