An encryption system in which the sender and receiver of a message share a single, common key that is used to encrypt and decrypt the message. Contrast this with public-key cryptology, which utilizes two keys – a public key to encrypt messages and a private key to decrypt them.
Symmetric-key systems are simpler and faster, but their main drawback is that the two parties must somehow exchange the key in a secure way. Public-key encryption avoids this problem because the public key can be distributed in a non-secure way, and the private key is never transmitted.
Symmetric-key cryptography is sometimes called secret-key cryptography. The most popular symmetric-key system is the Data Encryption Standard (DES).
Derived from the words synchronize, synchronous, and electricity, the term synchicity is a slang term used to describe a seamless playback of parallel multimedia streams without jittering or interruption. The term is often used in film-making and multimedia circles to describe the degree of synchronization between separate multimedia sources : voice, music, video, or animation.
)Occurring at regular intervals. The opposite of synchronous is asynchronous. Most communication between computers and devices is asynchronous — it can occur at any time and at irregular intervals. Communication within a computer, however, is usually synchronous and is governed by the microprocessor clock. Signals along the bus, for example, can occur only at specific […]
- synchronous groupware
Groupware that works in real-time allowing multiple participants to collaborate in groups at the same time. Examples of synchronous groupware include whiteboarding, text-based chat systems or videoconferencing. Contrast with asynchronous groupware.
The verb form of syndication.
- synchronous messaging
Synchronous messaging describes communications that takes place between two applications or systems, where the system places a message in a message queue (also called an Event Queue in enterprise messaging systems) and then waits for a message response before it continues processing. Contrast with asynchronous messaging.