TCP/IP Tutorial and Technical Overview - IBM Redbooks

protection. For Web applications that employ standard Internet security
techniques with TLS, the WAP gateway automatically and transparently
manages wireless security with minimal processing costs. It provides end-to-end
security and application-level security. This includes security facilities for
encrypting and decrypting, strong authentication, integrity, and key management.
WTLS complies with regulations about the use of cryptographic algorithms and
key lengths in different countries.
WTLS employs special adapted mechanisms for the wireless environment, for
example, long existing secure sessions, optimized handshake procedures for the
wireless network, and simple data reliability for operation over datagram bearers.
Figure 18-21 shows the location of WTLS in the WAP architecture model and the
internal WTLS architecture with its different WTLS protocols.
WTLS
Handshake
Protocol
Wireless Application Environment (WAE)
Wireless Session Protocol (WSP)
Wireless Transaction Protocol (WTP)
Change Cipher
Spec Protocol
Record Protocol
Alert
Protocol
Wireless Datagram Protocol (WDP/UDP)
Bearer Networks
Figure 18-21 WTLS within the WAP architecture and WTLS components
Chapter 18. Wireless Application Protocol 697