Introduction to Cryptography

Which three protocols use asymmetric key algorithms? (Choose three.)

• Secure Sockets Layer (SSL)

• Secure File Transfer Protocol (SFTP)

• Pretty Good Privacy (PGP)

• Advanced Encryption Standard (AES)

• Secure Shell (SSH)

What cryptographic algorithm is used by the NSA and includes the use of elliptical curves for digital signature generation and key exchange?

• ECC

• AES

• IDEA

• RSA

Which 128-bit block cipher encryption algorithm does the US government use to protect classified information?

• Skipjack

• Vignere

• Caesar

• AES

• 3DES

What term is used to describe concealing data in another file such as a graphic, audio, or other text file?

• masking

• obfuscation

• steganography

• hiding

What is the term used to describe the science of making and breaking secret codes?

• impersonation

• factorization

• jamming

• cryptology

• spoofing

Which two terms are used to describe cipher keys? (Choose two.)

• key space

• keylogging

• key length

• key randomness

Which type of cipher is able to encrypt a fixed-length block of plaintext into a 128-bit block of ciphertext at any one time?

• transform

• hash

• block

• stream

• symmetric

What term is used to describe the technology that replaces sensitive information with a nonsensitive version?

• blanking

• masking

• retracting

• hiding

• whiteout

What encryption algorithm uses one key to encrypt data and a different key to decrypt data?

• symmetric

• transposition

• one-time pad

• asymmetric

What type of cipher encrypts plaintext one byte or one bit at a time?

• block

• elliptical

• stream

• enigma

• hash