Combinator attack slow down - Printable Version +- hashcat Forum (https://hashcat.net/forum) +-- Forum: Deprecated; Previous versions (https://hashcat.net/forum/forum-29.html) +--- Forum: Old oclHashcat Support (https://hashcat.net/forum/forum-38.html) +--- Thread: Combinator attack slow down (/thread-3704.html)

Combinator attack slow down - Wolfdale - 10-02-2014 Hi! I'm using the combinator attack with cudahashcat. I have a gtx 680. For MD5 bruteforce I get 2700 MH/s. If I try combinator attack with 2 dicts (20k words and 120M words) I get 1500MH/s (I believe it is because i'm not using any rule?) The question is why towards the end it slows down to 1000 KH/s? Probably I'm doing something wrong, I've got alot to learn RE: Combinator attack slow down - coolbry95 - 10-02-2014 Combinator attack is always going to be slower. Everything is slower than a mask attack. OclHashcat slows down on purpose towards the end. It is adjusting the workload. Also I do not know if you are doing this or not, but the left dict needs to be larger than the left. The reason for this is the way GPGPU works. RE: Combinator attack slow down - atom - 10-02-2014 It's also because with mask-attack (or general with brute-force) we can do some optimization because we know what comes "next". Therefore we can make use of meet-in-the-middle etc.