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How are keys mapped to cipher texts in block ciphers with large block sizes?

block-cipher

modified 9 hours ago kelalaka 29.3k

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1

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20

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Decryption formula of Plaintext Block Chaining (PBC) mode of a block cipher

encryption block-cipher decryption

modified 11 hours ago kelalaka 29.3k

2

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1

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51

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How are SHACAL-2 ciphers calculated?

hash block-cipher sha-256 md5 merkle-damgaard

modified yesterday kelalaka 29.3k

5

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1

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257

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How do I decide what mode to use?

aes block-cipher modes-of-operation openssl

modified yesterday Maarten Bodewes♦ 76.2k

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How can we reason about the cryptographic capabilities of code-breaking agencies like the NSA or GCHQ?

cryptanalysis block-cipher symmetric nsa

answered yesterday forest 10.9k

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+500

How many additions modulo $2^k$ and multiplications in $\mathbb F_{2^k}$ are needed to resist cryptanalysis?

block-cipher number-theory

modified Jan 15 at 21:45 mentallurg 1,449

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Looking for encryption function given decryption function (2048-bit ciphertext and key, addition and subtraction operations)

encryption block-cipher decryption

asked Jan 10 at 10:03 king-pelinore 1

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1

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How to find which padding method is used in block cipher (AES) encyption?

encryption block-cipher

modified Jan 7 at 23:45 Maarten Bodewes♦ 76.2k

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How many rounds of encryption is ideal?

encryption block-cipher algorithm-design key-schedule

modified Jan 6 at 8:35 Maarten Bodewes♦ 76.2k

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Why don't we use Blowfish if it hasn't been cracked?

encryption cryptanalysis block-cipher provable-security blowfish

modified Jan 3 at 3:04 Community♦ 1

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Mathematical and empirical analysis of AES

encryption aes block-cipher symmetric

modified Dec 31 '20 at 7:19 DannyNiu 4,260

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Is there any cryptographic scheme with block size more than 128 bit

block-cipher keys key-size blocksize

modified Dec 25 '20 at 16:00 Community♦ 1

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Usage of block and stream ciphers

encryption block-cipher stream-cipher aes-gcm

asked Dec 22 '20 at 13:31 Dror123 21

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Stream cipher and block cipher usage in network data encryption

block-cipher tls stream-cipher aes-gcm ipsec

modified Dec 21 '20 at 21:54 Dror123 21

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