Encryption Tool Query - Same Input, Different Outputs

Encryption Tool Query - Same Input, Different Outputs

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Encryption Tool Query - Same Input, Different Outputs Lucanos 08-10-2007
Posted by Lucanos on August 10, 2007, 3:14 am
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Hey All,

I am hoping someone can help me, I seem to recall stumbling along a
resource which was able to use to achieve this result, but I lost that
link...

Anyway...

I am looking for an Encryption methodology, whereby I can encrypt a
string (or content) in such a way that the results it returns can be
different from each other, but when decrypted (using a single key/
method) the original string is returned.

Not explaining it very well, am I?

So, an example:
"the_string" >[ENCRYPT]> "stygtehitu"
"the_string" >[ENCRYPT]> "puysnyurwe"

"stygtehitu" >[DECRYPT]> "the_string"
"puysnyurwe" >[DECRYPT]> "the_string"

Where the Encrypt and Decrypt functions are passed the exact same key
in all four instances.

I am not sure if this is possible, but if anyone has an inkling about
what I am looking for, I'd appreciate some assistance.

Thanks
Luke


Posted by nemo_outis on August 10, 2007, 4:28 am
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@q3g2000prf.googlegroups.com:

> I am looking for an Encryption methodology, whereby I can encrypt a
> string (or content) in such a way that the results it returns can be
> different from each other, but when decrypted (using a single key/
> method) the original string is returned.

The standard way of achieving this is with a "salt" which is typically a
random number (but needn't be - a timestamp, for instance, would also work)

The salt is used either as a prefix or suffix to "the_string" and the
combined salt plus string is encrypted. With different salts the same
string will result in a different encrypted message.

On decryption the salt is, of course, discarded and only "the_string" is
considered.

Regards,


Posted by Bart Bailey on August 10, 2007, 8:57 am
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posted on Fri, 10 Aug 2007 07:14:59 -0000, Lucanos wrote: Begin

>Hey All,
>
>I am hoping someone can help me, I seem to recall stumbling along a
>resource which was able to use to achieve this result, but I lost that
>link...
>
>Anyway...
>
>I am looking for an Encryption methodology, whereby I can encrypt a
>string (or content) in such a way that the results it returns can be
>different from each other, but when decrypted (using a single key/
>method) the original string is returned.
>
>Not explaining it very well, am I?
>
>So, an example:
>"the_string" >[ENCRYPT]> "stygtehitu"
>"the_string" >[ENCRYPT]> "puysnyurwe"
>
>"stygtehitu" >[DECRYPT]> "the_string"
>"puysnyurwe" >[DECRYPT]> "the_string"
>
>Where the Encrypt and Decrypt functions are passed the exact same key
>in all four instances.
>
>I am not sure if this is possible, but if anyone has an inkling about
>what I am looking for, I'd appreciate some assistance.
>
>Thanks
>Luke

http://www.lassekolb.info/bfacs.htm
Set options to rename with random characters.
You can even alter that name after encryption because the encrypted file
has an internal header to determine algorithm. If you want something
that doesn't offer that much information try Apocalypso or Dozecrypt.

--

0x5BA09291F
convert to base 36 for the sig

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