AP®︎ Cybersecurity: Topic 5.3 Flashcards

Data saved on a drive or other storage medium rather than actively being transmitted or processed

The use of algorithms and keys to hide information and allow it to be recovered with the correct key

A defined process for encrypting and decrypting information

The process of hiding information by transforming plaintext into ciphertext

The process of reversing encryption with the correct key to recover the original plaintext

The original unencrypted binary data supplied to an encryption algorithm

The encrypted output of an encryption algorithm, ordinarily meaningless without the appropriate key

A predefined value that controls the particular transformation performed during encryption or decryption

The number of possible keys an algorithm can use; a larger keyspace makes discovering the correct key by guessing take longer

Encryption that uses the same shared secret key to encrypt and decrypt information

Encryption that uses two different related keys, one to encrypt information and the other to decrypt it

Encryption that processes data in fixed-size chunks called blocks, producing an output block for each input block

Encryption that handles input continuously and produces output one element, commonly one bit, at a time

The most common symmetric-key block cipher; it processes 128-bit blocks using 128-, 192-, or 256-bit keys

Openssl enc -aes-128-cbc -e -in test -k password -out test.enc

Openssl enc -aes-128-cbc -d -in test.enc -k password -out test