Tenable Attack Surface Management (formerly Tenable.asm, and previously Bit Discovery) is an external attack surface management (EASM) solution that integrates into a vulnerability management platform. Tenable.asm continuously maps the entire internet and discovers connections to internet-facing assets so that users can assess the security posture of the entire external attack surface, or those facets of an organization that face the public, and the Internet.
It can be used to access an attack surface map of more than 5 billion assets to discover domains related to assets in the user's inventory, and it offers notifications on changes in the attack surface for continuous monitoring.