symmetirc key encryption Flashcards
_____ encryption uses only one key to encrypt and decrypt data
symmetric
this symmetric key distribution method involves manually distributing the key
out-of-band distribution
this symmetric key distribution method uses a distribution algorithm and asymmetric technology to encrypt the key for distribution
in-band distribution
symmetric encryption uses which two algorithms
block and stream cipher
which symmetric algorithm encrypts by transporting plain text to cipher text in chunks
block cipher
which symmetric algorithm uses a sequence of bits for encryption
stream cipher
this symmetric crypto method uses a variable key size block cipher which was designed to replace DES.
RC2
this symmetric crypto method uses a secret key cryptographic algorithm
RC5
this symmetric crypto method was created by NSA
data encryption standard (DES) and
SkipJck
RC5 supports ___ bit blocks
32, 64, and 128
this symmetric crypto method is an enhanced version of DES
triple data encryption standard (3DES)
this symmetric crypto method uses a 168 bit key
triple data encryption standard (3DES)
this symmetric crypto method is iterative
advanced encryption standard (AES)
advanced encryption standard (AES) supports _____ bit keys
128, 192, 256
this symmetric crypto method uses block cipher and was intended to be free of problems associated with other algorithms
blowfish
this symmetric crypto method permits tradeoffs
twofish
this strengthens weak encryption keys
key stretching
it embeds a symmetric key into a message before the message is hashed
keyed-hash message authentication code (HMAC)
RC2 supports __ bit blocks
64
RC2 uses _____ to modify a password hash by using a random string of data to prohibit password hash matching types of attacks.
salt
DES uses a __ bit key and ___ bit parity for encryption
56
8
3DES uses a ____ bit key
168
blowfish uses ___ bit blocks and supports key lengths of
64
32 - 448 bits
twofish supports _____ bit keys and supports variable key lengths of
128
128, 192, 256
