antivirus program

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antivirus program

[‚an·tē′vī·rəs ‚prō·grəm] antivirus software

antivirus program

antivirus program

Software that searches for viruses. Also known as a "virus scanner." As new viruses are discovered by the antivirus vendor, their binary patterns and behaviors are added to a database that is downloaded periodically to the user's antivirus program via the Web. Popular antivirus programs are Norton, McAfee, Sophos, Bitdefender, AVG and Kaspersky. Windows Defender is Microsoft's own antivirus software that comes with Windows, starting with Windows 8.

Antivirus programs are used on all Windows machines, but most Mac users do not install them. However, as more Macs are acquired, the Mac has slowly but surely become a target of attacks, and Mac antivirus programs are being installed at a more rapid rate than in the past. See virus, quarantine, disinfect and scareware.

Multiple Detection Approaches
Early antivirus scanning matched the binary signature (pattern) of executable files against a database of known malware signatures before they were allowed to run. This "scanning" process was vastly speeded up by doing a one-time scan of all the executables in the computer and also when a new one is installed. If the executable is virus free, a checksum (hash) of its binary pattern is computed and stored in a checksum database. The next time the executable is launched by the user, its checksum is recomputed and compared with the virus-free checksum. If they match, the file was not adulterated.

Because malware may generate a unique signature each time it is downloaded to an unsuspecting user, antivirus programs also use behavior detection, which looks for suspicious activities such as copying and deleting files when launched (see behavior detection). See Symantec, McAfee, Sophos, Bitdefender, AVG, checksum, virus, polymorphic virus and Reputation-based Security.


Scan and Create a Checksum (Hash)
This is commonly used to speed up antivirus scanning, because computing and comparing an executable's checksum is considerably faster than analyzing the file each time it is loaded.
References in periodicals archive ?
In addition to targeting specific genes in the body, AVI's antiviral program uses NEUGENE antisense compounds to combat disease by targeting single-stranded RNA viruses, including West Nile virus, hepatitis C virus, dengue virus and Ebola virus.
an emerging leaderin infectious disease treatments, announced today that it will present new results on its antiviral program to 'prevent' PML at an industry conference sponsored by the PML Consortium (composed of Pfizer, Bristol-Meyers Squibb, Roche and Biogen Idec).
For a list of Winn-Dixie store locations where the antiviral program is available, please go to http://winn-dixie.
I'm pleased with the development of our broad-spectrum antiviral program, which is in the preclinical stage," remarked Martine Rothblatt, Ph.
Passport Health conducts on-site flu clinics for corporations nationwide and has an antiviral program in place.
7,268,227 relating to its leading antiviral program.
The FermaVir CMV antiviral program includes nucleoside analogues, as well as a series of non-nucleoside analogues, which appear to have a unique mechanism of action and have been shown, in vitro, to possess potent antiviral activity and a favorable cellular toxicity profile.
The FermaVir CMV antiviral program includes nucleoside analogues, as well as series of non-nucleoside analogues, which appear to have a unique mechanism of action and have been shown, in vitro, to possess potent antiviral activity and a favorable cellular toxicity profile.
I look forward to helping the Company advance its antiviral programs to tackle this significant unmet medical need, said Mr.
The Company also has antiviral programs for the treatment of other single and double stranded RNA viruses such as Respiratory Syncytial Virus (RSV), Norovirus and a Broad spectrum antiviral.
Because programs and operating systems are not usually designed with security in mind, antiviral programs will always be behind the curve, says Jajodia.
The acquired portfolio of research stage antiviral programs includes novel nucleotide polymerase inhibitors that have been identified and developed.