Asking for help: What is this string?

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Asking for help: What is this string?

Post by 0xBEEF1337 on Wed Jan 19, 2011 11:24 am
([msg=52430]see Asking for help: What is this string?[/msg])

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Re: Asking for help: What is this string?

Post by tremor77 on Wed Jan 19, 2011 2:21 pm
([msg=52435]see Re: Asking for help: What is this string?[/msg])

Random IV is Random Initialization Vector. http://en.wikipedia.org/wiki/Initialization_vector

"a block of bits that is used by several modes to randomize the encryption and hence to produce distinct ciphertexts even if the same plaintext is encrypted multiple times"

This could be one of two things off the top of my head without doing much research. It's either a WEP key for a wireless network or it could be a signed DRM, for copyrighted digital media. Its usually something associated with hardware devices, and to decrypt it you need to know the IV used during the encryption (possibly a sequential number or the time).

Cracking it is admittedly above my level of cryptography, but according to a quick read of the wiki, possible to do.
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Re: Asking for help: What is this string?

Post by 0xBEEF1337 on Wed Jan 19, 2011 3:39 pm
([msg=52444]see Re: Asking for help: What is this string?[/msg])

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Last edited by 0xBEEF1337 on Sat Jan 29, 2011 3:21 pm, edited 1 time in total.
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Re: Asking for help: What is this string?

Post by tremor77 on Thu Jan 20, 2011 12:45 pm
([msg=52513]see Re: Asking for help: What is this string?[/msg])

Which is somewhat confusing again, as I thought PHP could deal with decryption with the entire text, not just block-by-block.


Perhaps the encryption is meant to be decrypted block by block.. with some sequential encryption methods the actual encryption changes for each block, which could be designated as a sequential number by the IV. Lets say its just "1" - the first block is encrypted with "1" then next with "2" and so on? I'm just getting into encryption myself - new hobby of the day - so feel free to crush my theories plz :P

I may be wrong: There may be other perl encryption methods that include this header.


Perhaps someone modified an existing method in their own way, to create a unique custom encryption method.


So I went and google searched the string for Random IV "52616e646f6d4956" - I found a couple of links that might help.

http://efreedom.com/Question/1-1864700/Part-II-Make-Ruby-AES-256-CBC-PHP-MCRYPT-RIJNDAEL-128-Play-Together

http://efreedom.com/Question/1-2608234/Encrypting-Perl-CBC-Decrypting-PHP-Mcrypt

I am going to play with this myself, I find encryption to be quite fun and interesting, I just need to learn ALOT more.
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Re: Asking for help: What is this string?

Post by 0xBEEF1337 on Fri Jan 21, 2011 2:03 pm
([msg=52581]see Re: Asking for help: What is this string?[/msg])

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