Reports this week that as many as 68 million email addresses and passwords were leaked online as the result of a 2012 breach of Dropbox has grabbed wide attention for its sheer scope. But the fact that all of the passwords were hashed and salted makes the incident less severe for users than it otherwise might have been. Dropbox last week said that users who had signed up for the service prior to 2012 and had not changed their password since then would be prompted to reset it when they next attempted to sign in. The company described the move to proactive reset user passwords as a purely preventive measure.”]