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viruses are programmed not to infect the same file multiple times. They integrate well into the infected application a sequence of bytes allowing them to verify if the program has previously been infected: it is the virus signature.
The antivirus and based on this signature unique to each virus to detect them. This is the search method signature (scanning), the oldest method used by the virus.
This method is reliable only if the virus has a virus database update
The antivirus and based on this signature unique to each virus to detect them. This is the search method signature (scanning), the oldest method used by the virus.
This method is reliable only if the virus has a virus database update
Cette méthode n'est fiable que si l'antivirus possède une base virale à jour
note: commentcamarche Introduction aux virus