EvilZone

Hacking and Security => Reverse Engineering => : norcis October 19, 2015, 06:23:01 PM

: Finding encryption algorithm
: norcis October 19, 2015, 06:23:01 PM

Hi. There are two JSON messages bellow encrypted with unknown algorithm. Big chances it's common one. Who first could tell what encryption is it and what it hides?

d67d27edb53e77379831cef9aa13b6e0ff8d63be9a4c40098751f94bf2d248c20fc67e591cc897e291fabb68d23b7b2e70d556db5ad5f2f890e762c016b600994db7d9fbcc904b0fe15feb3c9389938b7ef1ea9d800ca6990f73ca04b63a566daa992b46c64b09b411809ca702ddb50b1db3a8e8f3c93bd22a7908cc637a84dffad7491a9f163f5de15d273285f1650101f7d610b29a73fa867989ba5e8106160104181e8a47d65394191b8a76dad1baf425c1529d0ab525cf60a757d40f23242763439df4d890156e3b4c7277744578


082ec8620300f66d0c34f22b44584715f3a0b8b1e94ff84659d0c0c93f4014fa8b1c6fd7fc8473ce147847ec1f5bfa77

: Re: Finding encryption algorithm
: kenjoe41 October 19, 2015, 06:38:43 PM

I don't get it. Is this a challenge, cos you don't have permission to post them, or is it a HELP ME kinda thing.
If it is the later, you will have a better and fun time trying to find it for yourself as a learning opportunity.

*cough* i smell a SHA-394 variant and few probable chances of a skeinvaraint. *cough*


ummmh..

: Re: Finding encryption algorithm
: norcis October 19, 2015, 06:44:50 PM

I tried things what I knew and couldn't do it so I asked for help. I will look at SHA-394. Thanks for replay.

: Re: Finding encryption algorithm
: ram1r3z0 November 01, 2015, 02:50:50 PM

Reply: Finding encrypption algorithm from only two ciphertext is not possible.

You can "guess" by see the length but it can send you wrong way.


I would take rather another approach ... to  look from where it is and try to determine which algorith the system uses,

: Re: Finding encryption algorithm
: Psycho_Coder November 01, 2015, 05:34:48 PM

If it is a hash you can use this : https://github.com/AnimeshShaw/Hash-Algorithm-Identifier to get a list of possible hashing schemes