Feel free (as in public domain) to use this function:
http://www.nirvani.net/software/misc/xor_string-1.0.0.inc.asc
Jeremy
Jeremy Brand :: Sr. Software Engineer :: 408-245-9058 :: [EMAIL PROTECTED]
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On Sat, 20 Jan 2001, Steve Quezadas wrote:
> Date: Sat, 20 Jan 2001 13:41:20 -0800
> From: Steve Quezadas <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: [PHP] XOR data encryption
>
> I am trying to store some credit card numbers in a database, along with the rest of
>the data (dangerous, I know). Unforunately, I am using a provider that doesn't have
>the mcrypt functions compiled into PHP, so I guess I am stuck using the swiss-cheese
>like XOR method of encryption. My client is too cheap to put a separate server to
>store the credit card numbers, so I am stuck using symmetrical encryption.
>
> NEvertheless, I want to implement XOR, but I can't find an example on the net that
>shows how to do it in PHP. I know the philosophy behind it, but hwo do you do it? Do
>you convert the letters in the passphrase and the credit card number into 0 1 binary
>and then XOR that? What commands are there iN PHP that converts from alphanumeric to
>binary? If someone could post an example, that would be great.
>
> - Steve
>
>
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