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This section talks about Fortuna, where it uses a block cipher with a 128-bit block and a 256-bit key size. The cipher is used in CTR mode. In the CTR mode, if an attacker can access the internal state than then the security is lost ( the key and current counter value), therefore after a request, 2 new blocks are generated and used as a new key, and the old ...
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ctr × 211aes × 109
encryption × 31
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block-cipher × 29
initialization-vector × 24
nonce × 19
cbc × 18
hmac × 13
stream-cipher × 13
authenticated-encryption × 12
random-number-generator × 10
chosen-plaintext-attack × 10
pseudo-random-function × 7
file-encryption × 6
hash × 5
authentication × 5
cbc-mac × 5
key-reuse × 5
deterministic-encryption × 5
cryptanalysis × 4
gcm × 4
known-plaintext-attack × 4
ecb × 4
blocksize × 4