- Mar 19, 2020
F-Secure switched from BD sigs to Avira sigs. They never used Kaspersky sigs. So I think it's unlikely they'll revert to BD sigs. After switching to Avira sigs, F-Secure became way lighter too.It is not likely F-Secure will use Kaspersky engine again. It's either Avira or BitDefender for them going forward.