Relying on these obsolete security articles is highly discouraged. Doing so may put your systems at risk.

Digital Signatures
Encryption and decryption address the problem of eavesdropping, one of the three Internet security issues mentioned at the beginning of this document. But encryption and decryption, by themselves, do not address another problem: tampering.
Encryption and Decryption
Encryption is the process of transforming information so it is unintelligible to anyone but the intended recipient. Decryption is the process of transforming encrypted information so that it is intelligible again.
Introduction to Public-Key Cryptography
Public-key cryptography and related standards and techniques underlie the security features of many products such as signed and encrypted email, single sign-on, and Secure Sockets Layer (SSL) communications. This document introduces the basic concepts of public-key cryptography. For an overview of SSL, see "Introduction to SSL." For an overview of encryption and decryption, see "Encryption and Decryption." Information on digital signatures is available from "Digital Signatures."
Introduction to SSL
This document introduces the Secure Sockets Layer (SSL) protocol. SSL has been universally accepted on the World Wide Web for authenticated and encrypted communication between clients and servers.
NSPR Release Engineering Guide
This paper is for engineers performing formal release for the NetScape Portable Runtime (NSPR) across all platforms.
The Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols are universally accepted standards for authenticated and encrypted communication between clients and servers. Both client and server authentication occur over SSL/TLS.