According to question from bytcoin (first page):
@bytcoin:
calculate k2 when k2 is 2xk1 with the same private key is trivial.
but in your example:
Nonce k1
r = 385570073629551546729230374184391439442417095537024350206131291065055332733
s = 76130260662571134678372154009160868461537800596554110575850229341703072615102
h = 42268864623620244998249895290537358742158169262361846431272029622156081203721
Nonce k2 (k1 / 2 = k2)
r = 79948557280043978274449002532600374620672215928697101734828211284733327158664
s = 56368220214898939855776145385640746541620815395185097101215290078962069907292
h = 87726031595873281985439431891132599611815665254308710544703498112157039462043
one of this h (hash of message) is wrong! this is why it cannot nonce be calculated.
it cannot be calculated, becouse: you have divide by application real (r,s,h) to get 1/2 of k.
your program cannot calculate 1/2 h > "hash of message" properly.
and this is why others calculation(result) are wrong.
if you give me real values( 2 transaction ) with information that k1 = 2 x k2 or k1 = 10x k2 or whatever
I will give you the nonce k1 and k2 and key.
If you want just pm.
I am back!
I chose a real signature on the blockchain and forged the second signature without knowing the private key. The forged signature has passed all validations and is valid...but it's still virtually impossible to calculate with the first one! I need to improve my calculations
@interiawp If I create 2 real transactions... same private key X and with the value k1 * 2 = k2. Would you be able to calculate the value of X?