Enhancement - Skip n/m keys, or -r rule-based-keycrack

[jamesyoungdigital]

Suppose we just want to either:

Have a crack at a keyspace, but don't care that much if we get it, Just speed it up a bit.

We are serious, and we know that brute-forcing one by one isn't going to work out. We need certain conditions, like skipping n out of m keys, like if we want to gather them in huge batches, and throw out n/m of them. E.g. Gather 1 trillion keys, and use n/m like 50000/100000 to exclude 50000 out of every 100000, maybe according to some kind of rule, instead of just the first 50000, maybe every 2nd key.

Another nice feature/enhancement would be only generating according to rules where we know what the private key will be like. So for example if I generated a gazillion private keys and they all started with 1111 .... then I could use -r 1111 which would specify some algorithm to only compute and try keys in the search space that start with the 1111 bit pattern. Or specify hex, -r 0x1 for tossing away keys that do not start with a 1 bit.

What do you think? Would it be terribly slow, considering it pre-computes then tosses some away, or can it easily just find a way in the case of -r 0x1 use something other than increment key by 1, and still be just as fast?

Thanks!

[brichard19]

Some of this will be addressed in the next build:

There is a --keyspace option which let's you specify the keyspace.

--keyspace START:END or --keyspace START:+NUM_KEYS

It's a more compact replacement for the existing -s and -r.

There is also a new --stride option where you specify how much to increment by: --stride N so you can skip keys.

[jamesyoungdigital]

Thanks heaps, I appreciate that.

I have something to share with you, if I could, in private. May I send you an email?

Or you could visit my profile where you can send me an email. I promise I won't hassle you, just a couple of questions and something to share.

... Ah yes, sorry I haven't tipped yet, I wasn't following the date correctly. I get paid today but I won't have BTC to tip until my pay hits my account tomorrow. Thank you!

[brichard19]

You can email questions to [email protected]. I really should put that on the main page since so many people ask.