We`ve noticed a trend lately of the latest operating systems and browsers removing support for MD5 signed SSL certificates. iOS 5, IE 9, and others have moved away from MD5. wolfSSL now signs certificates with SHA-1 by default and has support for SHA-256 signed certificates as well. If anyone would like support for SHA-512 please let us know, though it doesn`t appear to be widely adopted at the moment. The default test certificates for embedded wolfSSL are now all SHA-1 with RSA 2048 bit. It`s the same combination you`ll notice from most banks, paypal, and google. If you have any questions or feedback please let us know.