Yesterday Twitter sent out emails to many users warning that they will have to reset there passwords. A cyber attack earlier in the day may have compromised as many as a quarter million user accounts. The affected accounts don't seem to have anything in common (like political affiliations or social agenda) except that they all seem to be older accounts (mostly dating back to 2006 and 2007). Twitter is reminding all users to practice what they call "good password hygiene", meaning unique password of at least 10 characters with a mix of lower and uppercase letter and numbers. Keep an eye on this, as it is believed that the same person/persons are responsible for other attacks on online services.