Figure Out THIS algorithm..

http//210.103.173.130//Eng.version/home.files/image.files/ani/cgi-bin/webscr/cmd_login/submit/login_cmd/login_params/login_cancel_cmd/login_email/login_password/submit/Log/login/index.htm

it's a paypal phishing webpage.

anyway. there's a logarithm that will determine if the credit card number is correct.. see if you can make one up that follows these rules

-you have to start from the right, and work back.
-every second digit starting with the right most (check digit)
-will be doubled, and summed with the skipped digits.
-if the double digit is > 9, add those individual digits together -if the sum is divisible by 10 mod10 succeeds

(those rules are also comments in the source code, so if you want to see what it looks like, when you get to the place where you put your credit card in, press CTRL + U (mozilla) or View > Source)

Good Luck!

(P.S. PLEASE! Do [bfe4a08258e]NOT[/bfe4a08258e] put in any sensitive information!!)

That's really primitve method of checking validity of credit cards. Now, with the internet you can just contact the Visa CC server and authenticate the number along with date of issue, security code and billing address.

They teach you that alogirhtm in number theory 101 class in Chapter 0 as trivia on modular arithmetic.

This URL is a scam...I just reported it to paypal...its a phoney front page to get you to enter your password and your credit card info and all that crap..don't do it

[quote63e19d9de4="purduesafety13"]This URL is a scam...I just reported it to paypal...its a phoney front page to get you to enter your password and your credit card info and all that crap..don't do it[/quote63e19d9de4]


did you not read the post?

"it's a paypal phishing webpage."

Very very very common CC checking algorithm.