One’s Prezi-account is more prone to being used on ‘dirty’ computers than most other accounts. Especially in an educational setting where one logs in on different classroom computers. Considering this increased risk, I would very much appreciate a two-factor authentication option (2FA / 2-factor authentication) to be added to Prezi. It would give me much piece of mind knowing that even if I log in on a computer with a keylogger, that still would not give someone access to my account.
Most services nowadays offer 2FA, Prezi shouldn’t lag behind!