IDS

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IDS

(Intrusion Detection System) Software that detects an attack on a network or computer system. A Network IDS (NIDS) is designed to support multiple hosts, whereas a Host IDS (HIDS) is set up to detect illegal actions within the host. Most IDS programs typically use signatures of known cracker attempts to signal an alert. Others look for deviations of the normal routine as indications of an attack. Intrusion detection is very tricky. Too much analysis can add excessive overhead and also trigger false alarms. Insufficient analysis can overlook a valid attack.

Catch It at the Source
The opposite of intrusion detection is "extrusion detection." Such software examines the outgoing data in the computer to determine if malware is originating in this computer. See protocol anomaly, traffic anomaly, IPS and attack.
References in periodicals archive ?
un), the sole wireline telephone services provider in several rural communities in Alabama, Maine and Missouri, recently completed the sale of 3,000,000 Income Deposit Security units, using the proceeds to pay down over $55 million in senior debt.
13 per Income Deposit Security will be payable on March 20, 2008 to holders of record of Income Deposit Securities at the close of business on March 10, 2008.
42 per Income Deposit Security (each an "IDS"), which will be made on July 2, 2007 to holders of record at the close of business on June 15, 2007.
13 per Income Deposit Security will be payable on February 20, 2008 to holders of record of Income Deposit Securities at the close of business on February 8, 2008.
42 per Income Deposit Security (each an "IDS"), which will be made on March 30, 2007 to holders of record at the close of business on March 15, 2007.
13 per Income Deposit Security will be payable on January 18, 2008 to holders of record of Income Deposit Securities at the close of business on January 10, 2008.
42 per Income Deposit Security (each an "IDS"), which will be made on January 2, 2007 to holders of record at the close of business on December 15, 2006.