Cryptographic Solutions

Question 1

Encryption algorithm in which both the sender and receiver must know the same shared secret using a privately held key

Answer 1

Symmetric

Question 2

Encryption algorithm where different keys are used to encrypt and decrypt the data

Answer 2

Asymmetric Algorithm

Question 3

Utilizes asymmetric encryption to securely transfer a private key that can then be used with symmetric encryption

Answer 3

Hybrid Implementation

Question 4

Utilizes a keystream generator to encrypt data bit by bit using a mathematical XOR function to create the ciphertext

Answer 4

Stream Cipher

Question 5

Breaks the input into fixed-length blocks of data and performs the encryption on each block

Answer 5

Block Cipher

Question 6

Encryption algorithm which breaks the input into 64-bit blocks and uses transposition and substitution to create ciphertext using an effective key strength of only 56-bits

Answer 6

Data Encryption Standard (DES)

Question 7

Encryption algorithm which uses three separate symmetric keys to encrypt, decrypt, then encrypt the plaintext into ciphertext in order to increase the strength of DES

Answer 7

Triple DES

Question 8

Symmetric block cipher, which uses 64-bit blocks to encrypt plaintext into ciphertext

Answer 8

International Data Encryption Algorithm (IDEA)

Question 9

Symmetric block cipher that uses 128-bit, 192-bit, or 256-bit blocks and a matching encryption key size to encrypt plaintext into ciphertext

Answer 9

Advance Encryption Standard (AES)

Question 10

provides the ability to use 128-bit blocks in its encryption algorithm and uses 128-bit, 192-bit. or 256-bit encryption keys

Answer 10

Twofish

Question 11

Created by Ron Rivest, a cryptographer who’s created six algorithms under the name RC which stands for the Rivest Cipher

Answer 11

RC Cipher Suite

Question 12

Symmetric streamcipher using a variable key size from 40-bits to 2048-bits that is used in SSL and WEP

Answer 12

Rivest Cipher (RC4)

Question 13

Symmetric block cipher that uses key sizes up to 2048-bits

Answer 13

Rivest Cipher (RC5)

Question 14

Symmetric block cipher that was introduced as a replacement for the DES but AES was chosen instead

Answer 14

Rivest Cipher (R6)

Question 15

A hash digest of a message encrypted with the sender’s private key to let the recipient know the document created and sent by the person claiming to have sent it

Answer 15

Digital Signature

Question 16

Used to conduct key exchanges and secure key distribution over an unsecure network

Answer 16

Diffie Hellman (DH)

Question 17

Asymmetric algorithm that relies on the mathenmatical difficulty of factoring large prime numbers

Answer 17

RSA

Question 18

Heavily used in mobile devices and it’s based on the algebraic structure of elliptical curves over finite fields to define its key

Answer 18

Elliptic Curve Cryptography

Question 19

ECC version of the popular Diffie Hellman key exchange protocol

Answer 19

Elliptic Curve Diffie-Hellman (ECDH)

Question 20

Uses two different keys: One for encryption and one for decryption

Answer 20

Asymmetric Encryption (Public Key Cryptography)