Definitions for "Virus Signature"
Specific strings of binary code in most viruses (except polymorphic ones) that allow antivirus software to detect them. New viruses contain new signatures, which is why it is essential to keep signature files up to date.
a file which contains information the antivirus program needs to defeat viruses and clean infected files
a particular pattern of 'bits' or information contained in a virus that appears in no other file or program in the world, except for that virus
Characteristics marks of a virus that are tracked and fought by security service software vendors. Security patches are provided routinely by the most active software vendors, including McAfee, Norton (specifically their security tools including virus protection and firewalls), and Microsoft, which is working to secure flaws in its systems and programs.