https://openwall.info/wiki/ 2026-04-24T05:57:35+02:00 https://openwall.info/wiki/ https://openwall.info/wiki/lib/tpl/local/images/favicon.ico text/html 2012-07-11T20:44:26+02:00 https://openwall.info/wiki/john/GPU/bcrypt?rev=1342032266&do=diff This is currently known as format “bf-opencl” in John the Ripper 1.7.9-jumbo-6. Bcrypt isn't known to be much gpu friendly, the primary reason being the ridiculous amount of memory being used by each bcrypt hash. To make the matter worse the memory access is pseudo-random which makes it very difficult to cache the data into faster memory. With this we are left with two choices: 1.Use the slow and large global memory and spend more time fetching the operands than processing them. 2.Use the fast…