Re: XOR data encryption

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 :: jeremy@nirvani.net http://www.JeremyBrand.com/Jeremy/Brand/Jeremy_Brand.html for more - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "LINUX is obsolete" -- Andy Tanenbaum, January 29th, 1992 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://www.JEEP-FOR-SALE.com/ -- I need a buyer Get your own Free, Private email at http://www.smackdown.com/ On Sat, 20 Jan 2001, Steve Quezadas wrote: > Date: Sat, 20 Jan 2001 13:41:20 -0800 > From: Steve Quezadas <steveeq2@tripperjones.com> > To: php-general@lists.php.net > 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 > >