IPsec is an end-to-end cryptographic security scheme that is used to encrypt and authenticate each individual IP packet sent between a host and a client. IPsec is used to protect information that is sent over the Internet in order to prevent unauthorized users, such as hackers, from intercepting data.

TrueCrypt is a free, open source disk encryption software that is available for the Windows XP, Windows Vista, Windows 7, Mac, Linux, and Unix operating systems.

PGP (Pretty Good Privacy) is a type of cryptography that is used mostly for e-mail communication. PGP cryptography can be used in any system that involves digital data transmissions in order to provide adequate privacy for all entities involved.

A cryptographic certificate or digital certificate is a type of credential that is included with a public key to ensure that the key belongs to a specific user.

Cryptography is a term used to describe the encryption of communication between two independent systems and usually refers to the communication between a client computer and a server. Cryptography generally consists of a cipher, a public key, and a private key, but may also depend on certificates and hash functions for additional security.

Biometric cryptography is a type of cryptography that protects systems from unauthorized users by scanning the user’s biometric information and comparing it to information it already has stored on file. It then uses that information as a private key in order to decrypt encrypted information.

Cryptography is a system that is used to protect software, hardware, and electromagnetic frequencies by converting an input message into an equivalent output message via a cipher and a secret key.

Cryptography refers to the art of encryption and how it relates to computer science. It has been widely implemented in both personal and militaristic applications since computers were first introduced to the market.

With fast-access computers and interlinking networks that connect many different devices together, many users worry about other people stumbling upon their personal information.

 
A key server is a networked computer used to provide cryptographic keys to other computer programs or end-users. Key servers can be used on both internetal networks as well as across the Internet. Today, the primary keys that are served by key servers are keys in Open PGP, x.