Overview of Firewall Technologies

Firewalls are devices or programs that control the flow of network traffic between networks or hosts that employ differing security postures. While firewalls are often discussed in the context of Internet connectivity, they may also have applicability in other network environments.

For example, many enterprise networks employ firewalls to restrict connectivity to and from the internal networks used to service more sensitive functions, such as personnel or accounting. An organization [..]

Security – Principles of Authentification

The broadest definition of authentication within computing systems encompasses identity verification, message origin authentication, and message content authentication.
The concept of identity verification specifically applies to principals with information processing and decision making capabilities, including human users, computing systems and processes executing on those systems. From an authentication standpoint, the term “user” applies to all these principals. This guideline focuses on technology and techniques for verifying the identity of human users [..]

Electronic Credentials

Paper credentials are documents that attest to the identity or other attributes of an individual or entity called the subject of the credentials. Some common paper credentials include passports, birth certificates, driver’s licenses, and employee identity cards.

The credentials themselves are authenticated in a variety of ways: traditionally perhaps by a signature or a seal, special papers and inks, high quality engraving, and today by more complex mechanisms, such as [..]