passive-matrix display
A common type of flat-panel display consisting of a grid of horizontal and vertical wires. At the intersection of each grid is an LCD element which constitutes a single pixel, either letting light through or blocking it. A higher quality and more expensive type of display, called an active-matrix display, uses a transistor to control each pixel.
In the mid-90s, it appeared that passive-matrix displays would eventually become extinct due to the higher quality of active-matrix displays. However, the high cost of producing active-matrix displays, and new technologies such as DSTN, CSTN and HPA that improve passive-matrix displays, have cause passive-matrix displays to make a surprising comeback.
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- passive tag
In an RFID system the transponder which contains the data to be transmitted is called an RF tag. Passive RF tags obtain operating power generated from the RF reader. They are smaller and lighter than active tags but have a shorter communication range and require a high powered reader. Passive tags are generally read-only and […]
- passphrase
Similar to a password it a collection of words made up of any number of characters and also contains blank spaces. Passphrases are commonly used for authentication in security programs and cryptographic systems. A passphrase is also used to authenticate both sides of a connection when pairing Bluetooth devices.
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(n.) A secret series of characters that enables a user to access a file, computer, or program. On multi-user systems, each user must enter his or her password before the computer will respond to commands. The password helps ensure that unauthorized users do not access the computer. In addition, data files and programs may require […]
- password cracking
The process of attempting to guess or crack passwords to gain access to a computer system or network. Crackers will generally use a variety of tools, scripts, or software to crack a system password. The goal of the cracker is to ideally obtain the password for root (UNIX) or system and administrator (Windows, NT). Password […]