Cryptography Quiz

What is the science of encryption that combines cryptography and cryptanalysis called?

• Cryptology

• Decryption

• Cryptanalysis

• Encryption

Which method transforms each plaintext bit into a cipher bit one bit at a time?

• Substitution cipher

• Bit stream

• Block cipher

• Transposition cipher

What type of cipher uses two or more alphabets?

• Monoalphabetic substitution

• Polyalphabetic substitution

• Transposition cipher

• XOR cipher

Which encryption standard was adopted by NIST in 1976?

• Advanced Encryption Standard (AES)

• Data Encryption Standard (DES)

• Triple DES (3DES)

• Rivest Cipher (RC4)

What is the primary purpose of a digital signature?

• To encrypt messages

• To verify the sender's identity

• To compress data

• To manage keys

Which of the following is a hybrid cryptosystem designed for email encryption?

• Secure Socket Layer (SSL)

• Secure Hypertext Transfer Protocol (S-HTTP)

• Wired Equivalent Privacy (WEP)

• Pretty Good Privacy (PGP)

What does the term 'nonrepudiation' refer to in digital communications?

• The method of hiding information

• The process of verifying the sender cannot deny sending the message

• The ability to encrypt messages

• The use of public keys

Which attack involves intercepting the transmission of a public key?

• Dictionary attack

• Brute force attack

• Man-in-the-Middle attack

• Timing attack

What is the main function of hash functions in cryptography?

• To create digital signatures

• To manage keys

• To generate a message summary or digest

• To encrypt messages

Which protocol is used to secure communications across any IP-based network?

• Secure Electronic Transactions (SET)

• Internet Protocol Security (IPSec)

• Secure Multipurpose Internet Mail Extensions (S/MIME)

• Public-Key Infrastructure (PKI)