As in the subject is it possible to generate signature with given random number? According to the documentation of ECDSA uses RNG so it would be difficult to find out private key from signature but i want just to test my data to check if signature is being generated properly and i have'nt found any possible place where i would be able to pass random value. Any ideas? -- ________________________________________________________________________ Piotr ?obacz Biuro System?w i Oprogramowania RADMOR S.A. tel. (58) 6996 929 e-mail: piotr.lobacz at radmor.com.pl www.radmor.com.pl RADMOR S.A., ul. Hutnicza 3, 81-212 Gdynia NIP: 586-010-21-39 REGON: 190432077 KRS: 0000074029 (S?d Rejonowy Gda?sk-P??noc w Gda?sku) Kapita? zak?adowy wp?acony: 9 282 830 PLN