Barto John

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since May 19, 2020
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Recent posts by Barto John

In brief: Cipher.length()%64! = 0. You know, bit, blocks.

Ciphertext stealing (CTS) is a general method of using a block cipher mode of operation that allows for processing of messages that are not evenly divisible into blocks without resulting in any expansion of the ciphertext, at the cost of slightly increased complexity.
3 years ago
Okay... I Used a CTS -> https://en.wikipedia.org/wiki/Ciphertext_stealing.
Thank you all for your willingness and prose  :-D (joke)
3 years ago
Eh... Stil... I can't decrypt. Could you help me? someone ? What should be the result? And maybe I'll find my mistake.
3 years ago
Hello every one! (and i cant find good forum with my topic, sorry)
I have problem with one simple(?) example I have file with a hexa cryptogram and i should decrypt this with DES and ECB and i can't use a "Padding". Could you help me?
Key: "1234567890123456"
Output should be a string of letters of the Latin alphabet.
I attached file with cryptogram, (okey i cant attach) but it should be:
59 c8 4b 6b 56 fc 3e 2e 57 43 cd 32 92 72 77 00 69 a9 c8 2d 07 a1 2a 29 a6 bd 98 7c 0b 15 a3 f9 e9 ed 49 a7 d8 e9 dc cf 24 91 3c 68 d0 b2 ef 6a 41 6a 6d b9 79 df ea 41 5f 82 60 55 cf a3 e7 e3 58 1f 3b fc 1f 21 6e 77 28 42 ab fc fb ba 37 f5 57 ff b3 57 6a d5 52 bd b2 12 ec 14 f8 3e 1c aa e0 c4 82 98 e8 b5 8d 2d f2 15 f0 a0 a0 3d 37 45 7f d6 d0 20 b9 cb fc 69 c0 a3 52 eb 3d c4 5b 81 86 c4 22 42 c8 7b b1 d5 4a e7 90 61 dc a7 e6 04 b5 dd 10 74