Hi,all I want to do something with openssl as follows: 1.i want replace the RSA's implementation of openssl with my own implementation. 2.i have implemented a new cipher algorithm,and i want openssl make use of it. however, i want these changes take effect without rebuilding openssl. can anyone tell me how i achieve this with openssl? if i have to use openssl engine, i want to know how engine works and how it achieve this. many thanks! ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]