key/block sizes Flashcards
(26 cards)
WPA -
128-bit key (RC4 stream cipher + TKIP)
WEP -
40 bit key (RC4 stream cipher)
PRESENT
Block Size 64
Key size 80/128
Rounds 32
Lightweight equivalent to AES, RC5 more standardized
One of the 1st considered as an AES replacement for use in light-weight implementations. Beaten to it by RC5.
PRESENT
RC5
Block size 32, 64, or 128
Key size 0-2048
RSA
key size 1024-4096
Only 3 that don’t exclusive use 64 block size
AES, RC5, SIMON
DES
Block size 64
Key size 56
Rounds 16
3DES
Block size 64
Key size 112 or 168
Rounds 48
IDEA
64-bit blocks
128-bit key
17+ rounds
Intended to replace DES, similar to AES but with smaller block and more rounds
Blowfish/twofish
128-, 192- or a 256-bit encryption key
Skipjack
64-bit data blocks
80-bit key
AES 192 bit key
128 block
rounds 12
AES 128 bit key
128 block
rounds 10
XTEA
64 block
128 key
lightweight
WPA-2
128 block
128-bit/256-bit AES
What did TKIP do?
It circumvented the RC4 40-bit key size limitation of WEP, allowing 128 bit keys
WPA IV size
48 bits
WEP IV size
24 bits
Bitcoins use Elliptic Curve cryptography with __-byte private keys (which is a random number) and __-byte public keys, on a secp256k1
curve.
32 (256 bit)
64 (512 bit)
The only 32 bit block algorithm
RC5
Only 3 128 bit block
AES
PRESENT
Which symmetric encryption technique uses a 56-bit key size and a 64-bit block size?
DES
GSM uses what?
GSM uses the A5/1 or A5/2 STREAM cipher.
