MD5 checksum to original string conversion

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Dear All,
I've a String. Now i've converted to MD5 hash checksum value.
Now i want to decode the same string from the hash value.
Please tell me how to do thi.
Note : I'm using Crypto++ library.
Thank you all.

Posted 30-Jun-11 3:18am

Cpp_Com

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TRK3 30-Jun-11 10:19am

Why do you think you want to do this? The whole purpose of an MD5 hash is that it's supposed to be irreversible.

Either you are using MD5 for something you shouldn't be using it for, or you are trying to hack a password file...

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#realJSOP · Answer 1 · 2011-06-30T03:19:00

Solution 1

You can't convert a hash to the original string.

Posted 30-Jun-11 3:19am

#realJSOP

Comments

Sergey Alexandrovich Kryukov 1-Jul-11 23:44pm

I cannot stop wondering how people use hash functions and encryption not understanding the point of it. My 5.
--SA

Sergey Alexandrovich Kryukov 1-Jul-11 23:48pm

I added a warning about MD5 vulnerability and recommeded SHA-2 family.
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2011-07-01T17:47:00

Solution 2

Warning: If you use MD5 for any security purposes, stop doing it — it is unsafe. This algorithm is considered broken. Better use one of the hash functions from the SHA family.

See:
http://en.wikipedia.org/wiki/MD5#Security[^],
http://en.wikipedia.org/wiki/SHA-2[^].

—SA

Posted 1-Jul-11 17:47pm

Sergey Alexandrovich Kryukov