computer virus

(redirected from Virus signature)
Also found in: Thesaurus, Encyclopedia.


(ˈvaɪ rəs)

n., pl. -rus•es.
1. an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA or DNA core, a protein coat, and, in more complex types, a surrounding envelope.
2. a disease caused by a virus.
3. a corrupting influence on morals or the intellect; poison.
4. a segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.
[1590–1600; < Latin vīrus slime, poison; akin to ooze2]
vi′rus•like`, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend: virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computercomputer virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer; "a true virus cannot spread to another computer without human assistance"
malevolent program - a computer program designed to have undesirable or harmful effects
فيروس كمبيوتر
számítógépes vírus
počítačový vírus
References in periodicals archive ?
The virus signature database, which reads viruses and recognizes them, has expanded almost six times to include a lot of new threats and trojans.
In some cases, it hot half of any customer s machines after they updated to the latest virus signature file.
It also incorporates a security agent, which augments virus signature matching with behavior analysis to identify and prevent malicious threats, adding a layer of protection to both server and desktop computing systems.
Internetters' Anti-Virus software updates its virus signature files twice daily.
IBM's automated process typically takes less than 5 minutes to identify a virus signature and derive a prescription, the developers claim.
Various software features have a high level of awareness with virus protection and spyware protection topping the list but only 32% are aware of what a virus signature update is.
Advanced heuristics detect new e-mail worms without the need to update a virus signature database.
The Websense Enterprise Security Suite is designed to complement a company's existing anti-virus tools and protect a company's network from Web-based virus and mailware infection before an updated virus signature becomes available.
Speedy reaction is key in identifying a virus, producing the virus signature and releasing it to the customer.
A discovery feature has also been added to enable security managers to view configurations and distribute virus signature settings without placing undue strain on network resources.
With five anti-virus engines, GFI MailSecurity 10 has access to the most up-to-date virus signature updates from any vendor and will disseminate them the quickest, providing users with the best approach to detect and neutralize viruses, worms, trojans and other malware before they enter into the corporate network.
Messages and attachments that exhibit recurrent pattern characteristics of the emerging virus are automatically quarantined at the enterprise gateway where they can be held until the availability of a production-ready virus signature.