This standard defines secure message formats and processing for use by Wireless Access in Vehicular Environments (WAVE) devices@ including methods to secure WAVE management messages and methods to secure application messages. It also describes administrative functions necessary to support the core security functions. Purpose The safety-critical nature of many Wireless Access in Vehicular Environments (WAVE) applications makes it vital that services be specified that can be used to protect messages from attacks such as eavesdropping@ spoofing@ alteration@ and replay. Additionally@ the fact that the wireless technology will be deployed in communication devices in personal vehicles as well as other portable devices@ whose owners have an expectation of privacy@ means that in as much as possible the security services must be designed to respect privacy and not leak personal@ identifying@ or linkable information to unauthorized parties. This standard describes security services for WAVE management messages and application messages designed to meet these goals.