_____ makes use of a single secret key for both encryption and decryption. - Secret Key encryption (symmetric cryptography), Since the same key is used for both encryption and decryption in symmetric cryptography, a challenge that exists is__________________________________________ between the entity encrypting and the one decrypting. - Challenge is: finding a secure way to share or transport the key, _____-_____ is a widely used key exchange algorithm used to exchange the secret key in symmetric cryptography. - Diffie-Hellman, Two types of symmetric encryption - Block and Stream, _____________involves grouping data into blocks and encrypting the individual blocks - Symmetric block, _________involves encrypting one bit at a time, i.e., a synchronous stream - Symmetric stream, _________ encryption is often much faster than block and can typically be applied in real-time applications. - Symmetric stream, With symmetric block encryption, ________is used to fill blocks to operating size when the data does not fit perfectly. - padding, ECB, CBC, CFB, OFB, and CTR - Common block cipher modes, ___, ___, and ___ implementations essentially allow the block cipher to operate like a stream cipher. - CFB, OFB, and CTR, _________ make use of substitution boxes (S-boxes) to perform substitution as part of the encryption process. S-boxes take a given input and leverage look-up tables to produce a given output. - Secret key ciphers, All current cipher codes are crackable and a measure of the security of a code is the amount of _____it would take to break the code based on the ___________ power available. This is often referred to as the work factor. As processing power magnifies, security of current ciphers decreases. - time; computational, ________ is the process of adding an initialization vector to the ciphering process to change its operation and ensure that the ciphertext does not give the original plaintext when played back. - Salting,

D334-Chapter 2 Secret Key Recap

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