WSP :
Wireless Session Protocol (WSP) implements session services of WAP. Sessions can
be connection-oriented and connectionless and they may be suspended and resumed
at will.
WTLS:
Wireless Transport Layer Security protocal (WTLS) does all cryptography oriented
features of WAP. WTLS handles encryption/decryption, user authentication and
data integrity. WTLS is based on the fixed network Transport Layer Security
protocal (TLS), formerly known as Secure Sockets Layer (SSL).