note 74151 added to function.uniqid

Neither the pseudo-random number rand() nor the Mersenne Twister algorithms are cryptographically strong, and this is well known. Simply combining non-cryptographically strong algorithms doesn't not make a cryptographically strong algorithm either. Mersenne Twister is a fast algorithm with good k-distribution which will give you numbers for a long time before it repeats itself. MT, rand(), and MD5 should NOT be used for encryption, or for cookies that that store a session ID that gives personal information. A simple application where non-collision of session IDs is highly preferred but not critical, such as storing a user's shopping cart items for when they return to your site (but not their personal information), IS a good use for the MT, rand() MD5, uniqid() and combinations thereof. ---- Server IP: 64.71.164.2 Probable Submitter: 71.37.92.99 ---- Manual Page -- http://www.php.net/manual/en/function.uniqid.php Edit -- https://master.php.net/note/edit/74151 Del: integrated -- https://master.php.net/note/delete/74151/integrated Del: useless -- https://master.php.net/note/delete/74151/useless Del: bad code -- https://master.php.net/note/delete/74151/bad+code Del: spam -- https://master.php.net/note/delete/74151/spam Del: non-english -- https://master.php.net/note/delete/74151/non-english Del: in docs -- https://master.php.net/note/delete/74151/in+docs Del: other reasons-- https://master.php.net/note/delete/74151 Reject -- https://master.php.net/note/reject/74151 Search -- https://master.php.net/manage/user-notes.php