Early in 2009, when Twitter employed less than 50 people, we faced two different security incidents that impacted a small number of users. Put simply, we were the victim of an attack and user accounts were improperly accessed. There were 45 accounts accessed in a January incident and 10 that April for short periods of time.
Why are we bringing up these incidents from 18 and 14 months ago that we already told people about? Because the United States Federal Trade Commission (FTC) launched an inquiry into our security practices related to these attacks and today announced that we've reached an agreement that resolves their concerns.