Category Archives: Ciphers

TLS client does not drop connection even when there are no suitable ciphersuites in the server ciphersuite list during handshake

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I have two Windows systems, and I want to establish an encrypted TCP/IP communication between them. Specifically TLS 1.2 or TLS 1.3.
I have configured in both systems the list of allowed ciphersuites:

Win+R -> gpedit.msc which opens Lo… Continue reading TLS client does not drop connection even when there are no suitable ciphersuites in the server ciphersuite list during handshake→

How to calculate size of a codebook lookup table to break block cipher? [migrated]

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I was reading a book called Serious Cryptography. There is a page saying that block size must be large enough to prevent codebook attacks:

When 16-bit blocks are used, the lookup table needs only 2^16 × 16 = 2^20 bits
of memory, or 128 ki… Continue reading How to calculate size of a codebook lookup table to break block cipher? [migrated]→

how do i find the number of possible keys / password to decrypt a plain text

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I would like to know if there is any way to recover the plain-text of a message that’s been encrypted with 55 rounds of the Caesar cipher, with a different (independently chosen) key for each round; I must use a brute-force attack, and do … Continue reading how do i find the number of possible keys / password to decrypt a plain text→

Remove less secure ciphers from WHM by decrpyting different convoluted references to the same ciphers

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I have previously removed less secure ciphers from WHM (Web Host Manager) however it has been a while and I want to learn how to fish, not be handed a fish.

The trouble seems to stem from the fact that there is little-to-no consistency in… Continue reading Remove less secure ciphers from WHM by decrpyting different convoluted references to the same ciphers→