I've got a question about the signature of a CA.
As I understand, the CA takes the public key of the client and signs it with his own private key by using "md5WithRSAEncryption" (like explained here: http://en.wikipedia.org/wiki/X.509#Sample_X.509_certificates". What does it mean exactly? Can you give me a formal explanation for better understanding? Does the CA use both algorithms?
Second question In the first certificate example from wikipedia in section 'Subject Public Key Info:' there is defined the 'RSA Public Key:' Is that the plain public key which the CA got from the Client or is there something done on it?
Please give more hints for better understanding if you can.