Decryption challenge...

Decryption challenge...
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Decryption challenge... SimeonArgus 02-05-2007
Posted by SimeonArgus on February 5, 2007, 11:22 am
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I've got a very simple encryption algorithm, and I was wondering if
anyone would be willing to take me up on an offer to prove that this
algorithm has certain qualities.

My goal is to prove that it is secure, in that the average I.T. person
or computer programmer isn't going to be able to look at the
cyphertext and say "Gee, I bet this says 'Hello World'".

Secondly, since I don't have need for super-strong encryption, but I
do have need for very, very, very light-weight encryption that this
text would take at least a couple of hours and a reasonable knowledge
of encryption/decription methods to get at the data inside.

My challenge is this: I will post the sreen name of the first person
to correctly decode the following cypher text. If you are interested
in trying, knowing what I've stated above, reply to this post so I
know there are people banging on it. Bragging rights to the first
person to break it open and reveal the message inside.

In case there are newlines in the message that you get, note that
there are no newlines. This should be one continuous string before
attempting to decode.

Thanks, and good luck.

--Sim.

--- MESSAGE ---
pFbeEQUsCmhqGHRexPwNJweDkrvJ/yx+LrnHv
+Eza3XJYqsL0yCLftftYsHERYlxi6XkKL5fjWOl0BBNgTqXYIcAtnp7Qxs2ODlvTMT8CWkf19qH1eA6MS
+Llaf9Llky0GqvAt0njXfX5XiFkFCHeMfx5m36ToZjucVEBuRZyy7UftIUVjBFajgEc17E8Eh3FJjVmsH/
aXAuiZqx4HtYd9JmsAaRY5R2mPxgwMRFgz2E9/wj/
UPFZajHX0yOO9l3m0nIGRQlTz93AXRSi/8bOEaYwMjX8zoxKZmVsfAtQn3RcOIGkyfEdpb/
dYWCXp49iOvsbe5Ol2Kv2xBNhnOKaJhM3k97Qxk2OCZoWpCxAXRGg9qNgOEqYyWI2/78OkZ3hHqtEt00hX2DrGHAxEWDPYX36Cq
+Sod
+tcEPGeRZ9A2jUt4eVjBFajgGclKQ9EhqA9uSmMz3KGIlzcWr5nsJW4N1p0eZJodhjvx4wIARlXKS96k961GffaWXEFCHc41vkRrIBRQjT3xsUWxSivRIdAnX
+8jL/CZmYITB+eF7RX3QI7EXnC7KM/qGAa+tFoBxx/
XmPuoLnH61xxBJmzqDYtRX3gMFKE16ODBTerS/
SFMOltyD07IodiGE2/70NFky0GKpDpMkxGef5X
+Fh1mNcYvg5yr7B8VwrtEQWoY9nnWVTs4cFz1DcHYCIFSKsRtoCoHbhseyIGVu4L/
TmHYGQc1u7Gf9Q+QT94wMpeQx7B3nhYlNnivlEcC1MDnpU/kH
--- END MESSAGE ---


Posted by SimeonArgus on February 5, 2007, 11:45 am
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> I've got a very simple encryption algorithm, and I was wondering if
> anyone would be willing to take me up on an offer to prove that this
> algorithm has certain qualities.
>
> My goal is to prove that it is secure, in that the average I.T. person
> or computer programmer isn't going to be able to look at the
> cyphertext and say "Gee, I bet this says 'Hello World'".
>
> Secondly, since I don't have need for super-strong encryption, but I
> do have need for very, very, very light-weight encryption that this
> text would take at least a couple of hours and a reasonable knowledge
> of encryption/decription methods to get at the data inside.
>
> My challenge is this: I will post the sreen name of the first person
> to correctly decode the following cypher text. If you are interested
> in trying, knowing what I've stated above, reply to this post so I
> know there are people banging on it. Bragging rights to the first
> person to break it open and reveal the message inside.
>
> In case there are newlines in the message that you get, note that
> there are no newlines. This should be one continuous string before
> attempting to decode.
>
> Thanks, and good luck.
>
> --Sim.
>
> --- MESSAGE ---
> pFbeEQUsCmhqGHRexPwNJweDkrvJ/yx+LrnHv
>
+Eza3XJYqsL0yCLftftYsHERYlxi6XkKL5fjWOl0BBNgTqXYIcAtnp7Qxs2ODlvTMT8CWkf19qH1eA6MS
>
+Llaf9Llky0GqvAt0njXfX5XiFkFCHeMfx5m36ToZjucVEBuRZyy7UftIUVjBFajgEc17E8Eh3FJjVmsH/
> aXAuiZqx4HtYd9JmsAaRY5R2mPxgwMRFgz2E9/wj/
> UPFZajHX0yOO9l3m0nIGRQlTz93AXRSi/8bOEaYwMjX8zoxKZmVsfAtQn3RcOIGkyfEdpb/
>
dYWCXp49iOvsbe5Ol2Kv2xBNhnOKaJhM3k97Qxk2OCZoWpCxAXRGg9qNgOEqYyWI2/78OkZ3hHqtEt00hX2DrGHAxEWDPYX36Cq
> +Sod
>
+tcEPGeRZ9A2jUt4eVjBFajgGclKQ9EhqA9uSmMz3KGIlzcWr5nsJW4N1p0eZJodhjvx4wIARlXKS96k961GffaWXEFCHc41vkRrIBRQjT3xsUWxSivRIdAnX
> +8jL/CZmYITB+eF7RX3QI7EXnC7KM/qGAa+tFoBxx/
> XmPuoLnH61xxBJmzqDYtRX3gMFKE16ODBTerS/
> SFMOltyD07IodiGE2/70NFky0GKpDpMkxGef5X
> +Fh1mNcYvg5yr7B8VwrtEQWoY9nnWVTs4cFz1DcHYCIFSKsRtoCoHbhseyIGVu4L/
> TmHYGQc1u7Gf9Q+QT94wMpeQx7B3nhYlNnivlEcC1MDnpU/kH
> --- END MESSAGE ---

As a side note, I will describe the algorithm once someone has solved
it, or once enough time has passed that it is impractical to have
guessed it.

--Sim.


Posted by Sebastian Gottschalk on February 5, 2007, 12:26 pm
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SimeonArgus wrote:

> As a side note, I will describe the algorithm once someone has solved
> it,

Bullshit. How should someone solve it without knowing the algorithm?

Posted by Sebastian Gottschalk on February 5, 2007, 12:25 pm
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SimeonArgus wrote:

> I've got a very simple encryption algorithm, and I was wondering if
> anyone would be willing to take me up on an offer to prove that this
> algorithm has certain qualities.

Well, is you algorithm faster or better provable than he existing ciphers?

> My goal is to prove that it is secure,

You can't.

> in that the average I.T. person
> or computer programmer isn't going to be able to look at the
> cyphertext and say "Gee, I bet this says 'Hello World'".

That's nothing special.

> Secondly, since I don't have need for super-strong encryption, but I
> do have need for very, very, very light-weight encryption that this
> text would take at least a couple of hours and a reasonable knowledge
> of encryption/decription methods to get at the data inside.

Then why don't you use XTEA?

> My challenge is this: I will post the sreen name of the first person
> to correctly decode the following cypher text.

You forgot the present your algorithm. The ciphertext on its own is totally
useless for such a task.

Posted by Bogwitch on February 5, 2007, 1:23 pm
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SimeonArgus wrote:
> I've got a very simple encryption algorithm, and I was wondering if
> anyone would be willing to take me up on an offer to prove that this
> algorithm has certain qualities.
>
> My goal is to prove that it is secure, in that the average I.T. person
> or computer programmer isn't going to be able to look at the
> cyphertext and say "Gee, I bet this says 'Hello World'".
>
> Secondly, since I don't have need for super-strong encryption, but I
> do have need for very, very, very light-weight encryption that this
> text would take at least a couple of hours and a reasonable knowledge
> of encryption/decription methods to get at the data inside.
>
> My challenge is this: I will post the sreen name of the first person
> to correctly decode the following cypher text. If you are interested
> in trying, knowing what I've stated above, reply to this post so I
> know there are people banging on it. Bragging rights to the first
> person to break it open and reveal the message inside.
>
> In case there are newlines in the message that you get, note that
> there are no newlines. This should be one continuous string before
> attempting to decode.
>
> Thanks, and good luck.
>
> --Sim.
>
> --- MESSAGE ---
> pFbeEQUsCmhqGHRexPwNJweDkrvJ/yx+LrnHv
>
+Eza3XJYqsL0yCLftftYsHERYlxi6XkKL5fjWOl0BBNgTqXYIcAtnp7Qxs2ODlvTMT8CWkf19qH1eA6MS
>
+Llaf9Llky0GqvAt0njXfX5XiFkFCHeMfx5m36ToZjucVEBuRZyy7UftIUVjBFajgEc17E8Eh3FJjVmsH/
> aXAuiZqx4HtYd9JmsAaRY5R2mPxgwMRFgz2E9/wj/
> UPFZajHX0yOO9l3m0nIGRQlTz93AXRSi/8bOEaYwMjX8zoxKZmVsfAtQn3RcOIGkyfEdpb/
>
dYWCXp49iOvsbe5Ol2Kv2xBNhnOKaJhM3k97Qxk2OCZoWpCxAXRGg9qNgOEqYyWI2/78OkZ3hHqtEt00hX2DrGHAxEWDPYX36Cq
> +Sod
>
+tcEPGeRZ9A2jUt4eVjBFajgGclKQ9EhqA9uSmMz3KGIlzcWr5nsJW4N1p0eZJodhjvx4wIARlXKS96k961GffaWXEFCHc41vkRrIBRQjT3xsUWxSivRIdAnX
> +8jL/CZmYITB+eF7RX3QI7EXnC7KM/qGAa+tFoBxx/
> XmPuoLnH61xxBJmzqDYtRX3gMFKE16ODBTerS/
> SFMOltyD07IodiGE2/70NFky0GKpDpMkxGef5X
> +Fh1mNcYvg5yr7B8VwrtEQWoY9nnWVTs4cFz1DcHYCIFSKsRtoCoHbhseyIGVu4L/
> TmHYGQc1u7Gf9Q+QT94wMpeQx7B3nhYlNnivlEcC1MDnpU/kH
> --- END MESSAGE ---

The best place for this sort of thing is sci.crypt but guess what sort
of reception you'd get there?

Sebastian is correct, if you want us to 'prove the algorithm has certain
qualities' then you need to provide the algorithm.

The text arrived, not on one line, but randomly truncated. I'm guessing
the truncation occoured at points where there were spaces.

So, with no algorithm, and probably corrupted ciphertext, you've asked
us to perform close to the impossible. However, this does not mean your
algorithm is any good.

Bogwitch.


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