An algorithm created in 1991 by Professor Ronald Rivest that is used to create digital signatures. It is intended for use with 32 bit machines and is safer than the MD4 algorithm, which has been broken. MD5 is a one-way hash function, meaning that it takes a message and converts it into a fixed string of digits, also called a message digest.
When using a one-way hash function, one can compare a calculated message digest against the message digest that is decrypted with a public key to verify that the message hasn’t been tampered with. This comparison is called a “hashcheck.”
Plural of medium. (1) Objects on which data can be stored. These include hard disks, floppy disks, CD-ROMs, and tapes. (2) In computer networks, media refers to the cables linking workstations together. There are many different types of transmission media, the most popular being twisted-pair wire (normal electrical wire), coaxial cable (the type of cable […]
- mean opinion score
In voice telephony the term MOS, or mean opinion score is a measurement of the quality of human speech at the destination end of the circuit. MOS is expressed as a single number in the range of 1 (lowest perceived quality) to 5 (highest perceived quality). The MOS is an important factor in determining the […]
- media gateway
The terms media gateway and VoIP gateway are used synonymously, however, where VoIP gateway refers specifically to VoIP communications, the term media gateway includes additional media (e.g. video).
- media gateway controller
Abbreviated as MGC, media gateway controller is a system used in some VoIP architectures. MGC handles the registration and management of resources at the media gateway. A media gateway controller exchanges messages with central office switches via a signaling gateway. A media gateway controller is sometimes called a call agent, call controller, or softswitch.
- media server
In Internet and online communications, the media server processes all multimedia applications, such as call distribution, on-demand faxing, e-mail programs and others. In VoIP specific applications, the media server possesses and generates the media streams and handles all functions related to tasks such as decoding tones, bridging multiple streams, processing scripts, and recording audio.