hi! I am using openssl-smime for signing outgoing messages and verifying incoming. My question is about verifying. If the partner signs a message where the certificate is included in the signature all is OK. If he signes only with issuer and serial included in the signature i get an error ("signer certificate not found"). If I parse the signature with openssl-asn1parse I can see the content of the signature. So I see whats included. Do not know how to describe it in a better way. Is there a name for signatures with/without certificate-information? How can I get the signature get verifyed if there is no certificate included in it? Thanks for help! Chris