Vanity Address Tab addition

[n1bor]

When calc a vanity address there is a need for the user to
multiply 2 private addresses together. This needs to be done
offline.

[ghost]

I'm glad to see someone went ahead and did this. I reviewed the code but have not yet tested it. I'm curious if there's a reason why you chose multiply method over addition? I know keyconv uses the addition method but since you've no doubt tested this it would be apparent that either method works with vanitygen output.

[n1bor]

I did addition originally, and this is what the vanitygen.exe -P does (I know this as tested it!). But oclvanityminer.exe needs multiplication (I am told - https://bitcointalk.org/index.php?topic=84569.msg1226994#msg1226994). But there is some confusion in my mind as when I tested normal generation, -P and oclvanityminer.exe all seemed to search at the same speed.

I will add 2 additional outputs so that it displayed the added and multiplied so users can take their pick. Will update patch latter, or tomorrow.

[ghost]

I hadn't thought of it but it's a good idea to support both methods. That way if someone wants to create a vanity address for a friend or other third party they work it out using bitaddress as a trusted tool. I didn't know vanityminer used multiply but I haven't looked into it.

[ghost]

I had an idea for using this as split key paper wallets as discussed here,
https://bitcointalk.org/index.php?topic=114074.0
I think it's a good idea and so I thought I'd mention it would be good if the arrangement you use would be suitable for printing with QR codes just like other tabs. I could see this helping people solve the issue of securing systems for paper wallet creation.