Re: [PHP] image digit to check password
Om On 3/20/07, Jochem Maas [EMAIL PROTECTED] wrote: Tijnema ! wrote: On 3/20/07, Dave Goodchild [EMAIL PROTECTED] wrote: Have a look at this: Have a look at nothing :) I believe this Dave's way of pointing people to the Great Void :-) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- http://www.web-buddha.co.uk
[PHP] image digit to check password
Hi, There is a trend on internet that when you want to change your password, you need to type : 1. the former password. 2. the new one 3. a 2nd time the new one to confirm that no mistake has been done on step 2. however, several website also propose an additional security to avoid hacking/brute force, they display a 4 digit image with a random string including number and letters... something like A3P23. if user do not respect case and string, password is not changed. I would like to know how such system works and if a tutorial exist about that ? thanks a lot, -- Alain Windows XP SP2 PostgreSQL 8.1.4 Apache 2.0.58 PHP 5
RE: [PHP] image digit to check password
[snip] however, several website also propose an additional security to avoid hacking/brute force, they display a 4 digit image with a random string including number and letters... something like A3P23. if user do not respect case and string, password is not changed. I would like to know how such system works and if a tutorial exist about that ? [/snip] Google captcha -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
On 3/20/07, Alain Roger [EMAIL PROTECTED] wrote: Hi, There is a trend on internet that when you want to change your password, you need to type : 1. the former password. 2. the new one 3. a 2nd time the new one to confirm that no mistake has been done on step 2. however, several website also propose an additional security to avoid hacking/brute force, they display a 4 digit image with a random string including number and letters... something like A3P23. if user do not respect case and string, password is not changed. I would like to know how such system works and if a tutorial exist about that ? thanks a lot, The program itself is called CAPTCHA, you can of course look at their source. But in simple i can tell you how it works, it just creates the image with the PHP image functions, and saves a reference to which code used in session variable. Later this reference is checked with the code entered. In most cases the code in the image is MD5 encrypted and stored in the session. Then after submitting, the code entered is also MD5 encrypted and checked with the one in the session. Tijnema -- Alain Windows XP SP2 PostgreSQL 8.1.4 Apache 2.0.58 PHP 5 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
- Original Message - From: Jay Blanchard [EMAIL PROTECTED] [snip] however, several website also propose an additional security to avoid hacking/brute force, they display a 4 digit image with a random string including number and letters... something like A3P23. if user do not respect case and string, password is not changed. I would like to know how such system works and if a tutorial exist about that ? [/snip] Google captcha Not that long ago, your reply would have been considered gibberish Satyam -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
Have a look at this: -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
On 3/20/07, Dave Goodchild [EMAIL PROTECTED] wrote: Have a look at this: Have a look at nothing :) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
Tijnema ! wrote: On 3/20/07, Dave Goodchild [EMAIL PROTECTED] wrote: Have a look at this: Have a look at nothing :) I believe this Dave's way of pointing people to the Great Void :-) -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] image digit to check password
On Tue, March 20, 2007 11:52 am, Alain Roger wrote: There is a trend on internet that when you want to change your password, you need to type : 1. the former password. 2. the new one 3. a 2nd time the new one to confirm that no mistake has been done on step 2. however, several website also propose an additional security to avoid hacking/brute force, they display a 4 digit image with a random string including number and letters... something like A3P23. if user do not respect case and string, password is not changed. I would like to know how such system works and if a tutorial exist about that ? Search for the term CAPTCHA in Google. Add in PHP to get just PHP solutions. You will find LOTS. -- Some people have a gift link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
