IAS 101 - Week 11 and 12 - Cryptography

Is the process of making and using codes to secure the transmission of information.

• Cryptanalysis

• Cryptography

• Encryption

• Decryption

is the process of obtaining the original message (called the plaintext) from an encrypted message (called the ciphertext)

• Cryptography

• Cryptanalysis

• Encryption

• Decryption

is the process of converting the ciphertext message back into plaintext so that it can be readily understood.

• Encryption

• Decryption

What year did RSA Algorithm developed public cipher?

• 1977

• 1978

Substitute one value for another, for example a letter in the alphabet with the letter three values to the right.

• Substitution Cipher

• Transposition Cipher

This can be done at the bit level or at the byte (character) level.

• Transposition Cipher

• Substitution Cipher

Also known as the one-time pad, which was developed by AT&T, uses a set of characters only one time for each encryption process.

• Vernam Cipher

• Eclusive OR

Are mathematical algorithms that generate a message summary or digest (sometimes called a fingerprint) to confirm the identity of a specific message and to confirm that there have not been any changes to the content.

• Hash Functions

• Hash algorithms

It was developed by IBM and is based on the company’s Lucifer algorithm, which uses a key length of 128 bits.

• Data Encryption Standard (DES)

• Advanced Encryption Standard (AES)

is called private key encryption

•     Symmetric Encryption

•    Asymmetric Encryption