decrypt

[721f9d6c1b4540bddc0bf771da]

Hi. Need some help decrypting some MD5. My friend emailed it to me and my mac is not up to it. The code is 721f9d6c1b4540bddc0bf771da. (Like my username)

[Electronics Wizardy]

md5 is a one way hash. you can't easily go back. Also there are millions of combinations that will make this hash. The only way to get them is to brute force and that will take a very long time(decades)

[721f9d6c1b4540bddc0bf771da]

Thanks. I hoped that someone has a better computer than my iMac that was made in early 2009. Is there a Program that can decrypt this?

 

[Electronics Wizardy]

Just now, 721f9d6c1b4540bddc0bf771da said:

Thanks. I hoped that someone has a better computer than my iMac that was made in early 2009. Is there a Program that can decrypt this?

 

What is this a md5 of? A file? A password? A sentence?

 

by better computer I mean a supercomputer would take decades, so no.

[721f9d6c1b4540bddc0bf771da]

I think that it contains a few paragraphs of text

[Electronics Wizardy]

5 minutes ago, 721f9d6c1b4540bddc0bf771da said:

I think that it contains a few paragraphs of text

Then there is nothing you can do. It will be almost impossible to do this. 

[721f9d6c1b4540bddc0bf771da]

Just now, Electronics Wizardy said:

Then there is nothing you can do. It will be almost impossible to do this. 

Brilliant. Also no online decoders have it on their database

[Electronics Wizardy]

Just now, 721f9d6c1b4540bddc0bf771da said:

Brilliant. Also no online decoders have it on their database

Thats kinda the point of encryption, you can't just get the file back. Is there no other way to get the file back?

[721f9d6c1b4540bddc0bf771da]

No. If I do brute force this, will my awful GPU straight outta 2007 or my core 2 duo be used?

[2FA]

24 minutes ago, Electronics Wizardy said:

Thats kinda the point of encryption, you can't just get the file back. Is there no other way to get the file back?

Hashing is not encryption.

 

47 minutes ago, 721f9d6c1b4540bddc0bf771da said:

Hi. Need some help decrypting some MD5. My friend emailed it to me and my mac is not up to it. The code is 721f9d6c1b4540bddc0bf771da. (Like my username)

Any idea if the hash is salted?

[721f9d6c1b4540bddc0bf771da]

31 minutes ago, DeadEyePsycho said:

Hashing is not encryption.

 

Any idea if the hash is salted?

I dont know

 

[wasab]

No one can decrypt it except God. He knows everything. 

[JacobFW]

4 hours ago, 721f9d6c1b4540bddc0bf771da said:

Hi. Need some help decrypting some MD5. My friend emailed it to me and my mac is not up to it. The code is 721f9d6c1b4540bddc0bf771da. (Like my username)

FYI, as I'm sure you can tell, this is a very computationally intensive process, and one that can take a long time.  Not trying to be mean by saying this, but you're very unlikely to find someone willing to dedicate their computer's resources to this (at least not without paying them).

 

If you're really dedicated this, and if you haven't already done so,  I would recommend googling "cracking md5 passwords". 

[Mira Yurizaki]

Did anyone notice OP's username is the same as the MD5 hash?

 

EDIT: (Oh, OP said it, I thought we were just wasting our time )

[Mira Yurizaki]

Okay, found something else. 72 1f 9d 6c 1b 45 40 bd dc 0b f7 71 da is not a valid MD5 hash. MD5 hashes have a 128-bit digest size. OP's hash is less than that.

[vanished]

In addition, as mentioned, hashing is not encryption.  With encryption you could brute force and theoretically get back the original with enough effort.  With a hash, there are many (perhaps infinitely many) sources that would result in the same hash so not only do you need to find one (very hard) but you may need to find several and then know which one is the one you want.  It's basically impossible.

 

4 hours ago, 721f9d6c1b4540bddc0bf771da said:

I think that it contains a few paragraphs of text

So no, it doesn't "contain" anything.  Think about it, if you could hash literally anything and then undo it somehow, you would have created the best compression algorithm ever, but it's physically impossible.  It's the very definition of "lossy".

[Mira Yurizaki]

5 minutes ago, Ryan_Vickers said:

Think about it, if you could hash literally anything and then undo it somehow, you would have created the best compression algorithm ever, but it's physically impossible.  It's the very definition of "lossy".

Theoretically Pi, e, and other irrational numbers fit this bill. If you can find where your pattern of bits lay. :B

[721f9d6c1b4540bddc0bf771da]

50 minutes ago, M.Yurizaki said:

Okay, found something else. 72 1f 9d 6c 1b 45 40 bd dc 0b f7 71 da is not a valid MD5 hash. MD5 hashes have a 128-bit digest size. OP's hash is less than that.

b201ad0a9c5be785fffc49c2f111e654 might be the right one? I think i Copy pasted this way to much and got a wrong one

i have a pretty large notepad file full of md5 that has got to be decrypted.

[Mira Yurizaki]

2 minutes ago, 721f9d6c1b4540bddc0bf771da said:

b201ad0a9c5be785fffc49c2f111e654 might be the right one?

It's a valid hash and none of the online MD5 reverse lookup sites are hitting anything. However, the principle still stands: strictly speaking you can't reverse a hash unless you already know what the original content was, because the hash could've been anything.

[721f9d6c1b4540bddc0bf771da]

Just now, M.Yurizaki said:

It's a valid hash and none of the online MD5 reverse lookup sites are hitting anything. However, the principle still stands: strictly speaking you can't reverse a hash unless you already know what the original content was, because the hash could've been anything.

Thats fine. It is just that i have got a truckload of MD5, so what shall I do it. My iMac straight outta 2009 is probably not up to the job

[Mira Yurizaki]

6 minutes ago, 721f9d6c1b4540bddc0bf771da said:

Thats fine. It is just that i have got a truckload of MD5, so what shall I do it. My iMac straight outta 2009 is probably not up to the job

If an MD5 reverse lookup doesn't have it, you probably should give up on it if the only thing you know about it is the hash.

 

And if an MD5 reverse lookup has it, you should be worried depending on what you were using that hash for.

Edited February 15, 2018 by M.Yurizaki

[721f9d6c1b4540bddc0bf771da]

Just now, M.Yurizaki said:

If an MD5 reverse lookup doesn't have it, you probably should give up on it unless the only thing you know about it is the hash.

 

And if an MD5 reverse lookup has it, you should be worried depending on what you were using that hash for.

Ok, out of the hundreds, I know, like 2

[721f9d6c1b4540bddc0bf771da]

Here they are

098f6bcd4621d373cade4e832627b4f6 = test

38b0d2ff1c03df82aea67222983d337e  = test 2

Im really sad

 

[vanished]

Could we get a bit more context about this?  Why do you have these, where did they come from, why do you need to "decrypt" them?

[Mira Yurizaki]

Wow I hate my mind sometimes.

 

4 minutes ago, M.Yurizaki said:

you probably should give up on it unless the only thing you know about it is the hash

I meant to say you should give up on it if the only thing you know about it is the hash.