Security reporter Graham Cluley writes:Online backup company Carbonite is the latest firm to have issued a warning that hackers are attempting to break into its users accounts, and are prompting all users to change their passwords as a result. An email has been sent to Carbonite users explaining that the attackers are thought to be using passwords gleaned from other recent mega-breaches. "Based on our security reviews, there is no evidence to suggest that Carbonite has been hacked or compromised," the email reads. "To ensure the protection of all our customers and the safety of their data, we are requiring all Carbonite customers to reset their login information."Instructions to assist you with changing your password is here.