I had read that F-Secure uses BitDefender's engine. Is that true?
Uses only bitdefender, uses own or someone else?
Yes, we license technology from our partner, Bitdefender, and employ their AV engine in corporate and consumer security products. However, we do develop and use our own technologies for advanced malware scanning, network interception and behavior analysis, such as DeepGuard, which help us to win AV-TEST award 4th time in a row.
F-Secure has long relied on "import" for the traditional finger-print based big virus scanning engine. It's a concept previously called "Counter Sign" architecture, where various scan engines can be plugged into a common F-Secure framework or replaced with relative ease. The previous generation product used AVP. Now it's I think:
BitDefender Aquarius (licensed, fingerprint based, heavy, knows most malware since antiquity)
Hydra (in-house, probably fingerprint based, lighter weight, but only against new, modern malware)
Gemini (in-house developed heuristics)
Deepguard (in-house system and program behaviour watch and control technology, quite famous)
A-Spam (licensed junk mail filter)
By the way, at least 12, possible twice as many other anti-virus vendors worldwide licence the BitDefender Aquarius engine, this is really a widespread practice. Quite like the swiss watches industry, where most mechanical engines (ebauche) are made by ETA and then brand name vendors add various "complication" extras to those and put them into their designer cases, so every customer can find one for his/her own taste of functionality and usability.
Best Regards: Tamas Feher, Hungary.