note 52555 deleted from function.uniqid by mazzanet

Note Submitter: tommiboy ---- "It seems intuitively likely that at least 2 people somewhere in the world over the past 12 years have already got back exactly the same hash because of what they fed in to be digested." Really? 12 years = 86400 * 365 *12 seconds = 3,7 * 10^8 seconds 2^128 = 3,4 * 10^38, thus approximately 10^38 samples are needed to find a collison (1.7* 10^38, more exactly) Consequently, this means: --> MD5 calculations per second during last 12 years = 10^30 (worldwide) Approx. number of PCs worldwide: 820 million (2004), this is <= 10^9 --> MD5 calculations per PC per second >= 10^21 An optimized MD5 implementation takes around 400-450 clock cycles on Pentium-class hardware. --> During the past 12 years, the average PC had a clock frequency of 10^23 Hertz. That is about a quadrillion times faster than the PC which I bought last week :)