引用
Mr.YOYOsap RFC Trusted/Trusting (权限)
记得有人问过关于RFC的权限问题,以前在做权限管理时,记得有一个权限对像S_RFC今天在help里又看到了关于RFC Trusted/Trusting .虽然已不再做权限管理的事情,但还是把他记下来.以供需要的朋友参考.
RFC Trusted/Trusting Systems  
You can use transaction SMT1 to define a calling system in the system being called as a trusted system. The system being called is then referred to as a trusting system.
Trusted SAP systems can log on to another SAP system without the need for a password. The existence of trust relations such as this between SAP systems has the following advantages:
·        "Single Sign-On" across system boundaries
·        No password transfer across the net
·        Timeout mechanism for the logon data prevents misuse.
·        User-specific logon data for the trusted system is checked.
You can configure multiple SAP systems as mutual trusted systems. When building a trust relationship between two systems, the initiative starts with the called system (server system). Here, users of the calling system who are allowed to make RFC calls by way of a trust relationship of this kind, must be identified in the system being called (trusted users).
Before a trusted system can be defined, a destination for this system must be created in the trusting system. In addition, the RFC users must have the corresponding authorizations in the trusting system (authorization object S_RFCACL). You can check the authorizations for the logged on users in the trusting system in advance, by using the function module AUTHORITY_CHECK_TRUSTED_SYSTEM.
 
In a trust relationship, the calling system (client system) plays the role of the trusted system, and the called system (server system) plays the role of the trusting system.