Australia: (+61) 2801 48283, (+61) 2801 44572, (+61) 1300 954 574 (English - 24 hour service)
Brasil: (+55) 11 395 88 765 
Canada: (+1) 647 955 1197 , (+1) 647 847 3405 
Deutschland: (+49) 2319 8928 017, (+49) 2318 868 043 
Espańa: (+34) 902 190 765 
France: (+33) 8 92 561 161 (0,34€ TTC / min) 
Italiano: (+39) 0699 268 342 
New Zealand: (+64) 998 535 51 
Osterreich: (+49) 2319 8928 017, (+49) 2318 868 043 
Romania: (+40) 21 300 1226, (+40) 21 300 1227 
Schweiz: (+49) 2319 8928 017, (+49) 2318 868 043 
United States: (+1) 954 928 2780 
United Kingdom: (+44) 208 819 2649 
WorldWide: (+40) 21 264 1794 
The update system for virus signatures
The virus signature, also known as virus definition, is a unique binary string that represents a part or the entirety of a computer virus. In a similar way to fingerprints, it helps identify specific viruses. Antivirus software uses virus signatures to precisely detect malicious codes.
BitDefender uses an incremental virus signature system based on two file types, cvd and ivd. The first contains the main collection of virus signatures, while the second stores only the latest updates. Once every three months, BitDefender downloads an updated version of the cvd file and ivd is reset to 0. This allows for small daily virus signatures updates.
In order to further optimize the update transfers and the scan speed, similar virus signatures are combined into a single pattern, specific for an entire virus family. This process reduces the number of virus signatures displayed in the product, without adversely affecting the virus detection.
BitDefender allows automatic download of virus signatures, or they can be downloaded as separate packages.
