"Just A Little Bit More" by
Joop van de Pol, Nigel P. Smart & Yuval Yarom.
Is it possible that by observing just 25 OpenSSL signatures, could we retrieve the keys of the ‘secp256k1 curve' ??
Discussion
What is an OpenSSL signature?
Go with the 2nd or 3rd edition of Ivan Ristić on 'OpenSSL'… Learn how to secure your servers & web applications!
https://www.desmith.net/NMdS/Data/Books%20and%20Manuals/openssl-cookbook.pdf#page83