EC-CES Certified Encryption Specialist questions with complete solutions

The most widely used asymmetric encryption algorithm is what? +Caesar Cipher +Vigenere +RSA +DES CORRECT ANSWERS: RSA The RSA encryption algorithm is one of the most widely used public key encryption algorithms that have ever been invented. It was created by the three scientists Ronald Rivest, Adi Shamir, and Leonard Adleman in 1977, and today it is increasingly being used in the network area. Which of the following is not an asymmetric system? +SSL +DES +PGP +RSA CORRECT ANSWERS: DES The Data Encryption Standard is a symmetric-key algorithm for the encryption of electronic data. Although now considered insecure, it was highly influential in the advancement of modern cryptography. In order for User A to send User B an encrypted message that only User B can read, User A must encrypt message with which of the following keys? +User B's public key +User B's private key +User A's public key +User A's private key CORRECT ANSWERS: USER B's Public Key Public key cryptography, or asymmetrical cryptography, is any cryptographic system that uses pairs of keys: public keys which may be disseminated widely, and private keys which are known only to the owner Which of the following is generally true about block sizes? +Block size is irrelevant to security +Block sizes must be more than 256 bits to be secure +Larger block sizes increase security +Smaller block sizes increase security CORRECT ANSWERS: Larger Block sizes increase security