The TrustedSource Toolbar that launches this week is CipherTrust’s first foray into the consumer and home-user security space.
The free toolbar sits on top of the PC user’s inbox. It is powered by the TrustedSource reputation database which scores IP addresses on a spectrum of good to bad, depending on the sender history and various message characteristics. The system works like a reverse DNS checker, said David Stanley managing director and VP CipherTrust EMEA. It performs a quick look-up to the reputation database, scoring it against details held on the sender IP address.
The reputation database has tens of millions of addresses in it, each with a reputation score. Unknown addresses, many of which can be zombies, have no reputation. The company says it analyzes data from a variety of sources, including more than 100 billion consumer/ISP messages a month and another 10 billion enterprise messages a month.
The system creates a profile of all senders’ behavior based on several criteria. These include details on when the sender was seen for the first time, how much e-mail the sender posts, whether they send and receive or just send, and whether the messaging comes in bursts or is of a more continuous pattern.