HP UX Security Products and Features Software End User Applications, Common Security Services Manager (CSSM) APIs, and, and, and, and, Data, (CL), (DL), (TP), Trust, (CSP), Figure, Policy, Library

	Common Data Security Architecture (CDSA) White Paper
	What Is CDSA?
Figure 1-4	CDSA, shown relative to higher-level protocols and user
	applications

End User ApplicationsHigher-Level Security Protocols (PKCS, SSL, S/MIME, IPSEC, SET, et al.)Common Security Services Manager (CSSM) APIs

Crypotgraphy	Certificate	Data Storage	Trust Policy
Services	Library	Library
			Manager
Manager	Manager	Manager
			and
and	and	and
			Interface
Interface	Interface	Interface
Cryptography	Certificate	Data	Trust
Services		Storage	Policy
	Library
Provider		Library	Library
	(CL)
(CSP)		(DL)	(TP)

The first protocol to have developed widespread use is called Secure Sockets Layer (SSL), which runs on top of TCP/IP and provides security for web browsers and servers.

Another protocol, called Secure Multipurpose Internet Mail Extensions (S/MIME), is used to safeguard email over the Internet. MIME extended the email specification, so that other data types, such as graphics and files created using word-processing programs, can be included in email messages. S/MIME provides privacy, authentication, and integrity services for Internet email messaging.

Pretty Good Privacy (PGP) is another protocol that uses cryptographic techniques for doing security messaging.

Secure Electronic Transactions (SET) is a protocol designed to protect transfer of credit-card information over the Internet. It is a standard being promoted by VISA and MasterCard.

The above protocols make use of some subset of the thirteen Public-Key Cryptography Standards (PKCS). These standards address RSA encryption, password-based encryption, and extended certificate syntax. One of the key benefits of PKCS is that the standards

16 Chapter 1