Quote from: ETFbitcoin on March 01, 2021, 11:54:23 AM

Quote from: rama_rao on February 28, 2021, 05:45:38 PM

Quote from: ETFbitcoin on February 27, 2021, 11:20:12 AM

2. What is the simple mathematical problem? Finding private key if someone reuse k value?

What is that? Is it similar to this: https://allprivatekeys.com/random-vulnerability

Exactly same with link you share. Here's similar topic which mention k value, https://bitcoin.stackexchange.com/q/35848

Quote from: rama_rao on February 28, 2021, 05:45:38 PM

Then don't worry. Last month I've checked all of bitcoin addresses for this and found like 1000 addresses with this vulnerability and only 3 with balances. All 3 <500 sats. So, you won't find anything new...

I know, it's just problem with the implementation, not the cryptography itself.

a lot of people know how to from this article already 9a lot of people copy article it can found on google search multiple blog)

check sample transaction have r s z value, all zero balance already

Unfortunately all address list on puzzle can not find z value or have only 1 z value, not enough to useful
still very hard to calculate with that method

however good article and knowledge