The task:

We have 2 signatures
d - private key
k - nonce
r - public key
s - Signature
z - Hash

d1=(k1*s1-z1)/r1 k1=(d1*r1+z1)/s1 r1=(k1*s1-z1)/d1 s1=(d1*r1+z1)/k1 z1=k1*s1-d1*r1

Any ideas if we have a signature another signature

d2=1/k-1 k2=1/k1 r2=(k2*s2-z2)/d2 s2=(d2*r2+z2)/k2 z2=k2*s2-d2*r2

We have 1/k and k, how can we calculate the value of k?