Secure Store Service (PN)~ The shared service that securely stores credential sets for external data sources and associates those credential sets to identities of individuals or to group identities. This service can be used to support a variety of solutions. For example the stored credentials can be leveraged by certain applications to enable single sign-on. secure transaction technology (n)~ The use of the SSL (Secure Sockets Layer) S-HTTP (Secure HTTP) or both in online transactions such as form transmission or credit card purchases.