This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “The Simplified Data Encryption Standard (SDES)”. 1. What is the size of the key in the SDES algorithm? a) 24 bits b) 16 bits c) 20 bits d) 10 bits 2. Assume input 10-bit key, K: 1010000010 for the SDES algorithm. What is … Read more
This set of Cryptography Assessment Questions focuses on “The Data Encryption Standard (DES) and It’s Strength”. 1. During decryption, we use the Inverse Initial Permutation (IP-1) before the IP. a) True b) False 2. A preferable cryptographic algorithm should have a good avalanche effect. a) True b) False 3. The number of tests required to … Read more
This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “The Data Encryption Standard (DES) and It’s Strength”. 1. DES follows a) Hash Algorithm b) Caesars Cipher c) Feistel Cipher Structure d) SP Networks 2. The DES Algorithm Cipher System consists of ____________rounds (iterations) each with a round key a) 12 b) 18 … Read more
This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “Block Cipher Systems”. 1. In affine block cipher systems if f(m)=Am + t, what is f(m1+m2) ? a) f(m1) + f(m2) + t b) f(m1) + f(m2) + 2t c) f(m1) + t d) f(m1) + f(m2) 2. In affine block cipher systems … Read more
This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “Substitution and Transposition Techniques”. 1. Use Caesar’s Cipher to decipher the following HQFUBSWHG WHAW a) ABANDONED LOCK b) ENCRYPTED TEXT c) ABANDONED TEXT d) ENCRYPTED LOCK 2. Caesar Cipher is an example of a) Poly-alphabetic Cipher b) Mono-alphabetic Cipher c) Multi-alphabetic Cipher d) … Read more
This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “Symmetric Cipher Models and Elementary Number Theory”. 1. In brute force attack, on average half of all possible keys must be tried to achieve success. a) True b) False 2. If the sender and receiver use different keys, the system is referred to … Read more
