Cyber Security Exam 2 2023 with correct answers

Cryptography correct answersprotects information even when it is not under your physical control Uses of Encryption correct answersPrivacy, Authenticity, Integrity, Nonrepudiation Nonrepudiation correct answersPositive proof that a message or action originated with a certain party Process of Encryption correct answersKey & Plaintext in Algorithm which creates a ciphertext Kerckhoff's Principle correct answersWe assume that threats are familiar with how our cryptography works All security rests in a secret key Types of Cryptanalysis correct answersKnown Ciphertext, or Ciphertext Only All we know is the ciphertext Most difficult situation, but common Known Plaintext We know the plaintext to match some of the ciphertext encrypted with a particular key Chosen Plaintext We can choose some plaintext to encipher with our victim's cipher, and retrieve the ciphertext Replace each letter in a text by the 3rd letter following it in the alphabet correct answersCaesar Cipher Uses a series of different rotations The "key" may be a word - each letter indicates a rotation correct answersVignère Ciphers