Gartner defines security service edge (SSE) as a solution that secures access to the web, cloud services and private applications regardless of the location of the user or the device they are using or where that application is hosted. SSE protects users from malicious and inappropriate content on the web and provides enhanced security and visibility for the SaaS and private applications accessed by end users. Security service edge provides a primarily cloud-delivered solution to control access from end users and edge devices to applications (private or delivered via SaaS) as well as websites (and to a lesser extent general internet traffic). It enables a hybrid workforce more efficiently than traditional on-premises solutions. Capabilities integrated across multiple traffic types and destinations allow a more seamless experience for both users and admins while maintaining a consistent security stance.
Gartner defines single-vendor secure access service edge (SASE) offerings as those that deliver multiple converged-network and security-as-a-service capabilities, such as software-defined wide-area network (SD-WAN), secure web gateway (SWG), cloud access security broker (CASB), network firewalling and zero trust network access (ZTNA). These offerings use a cloud-centric architecture and are delivered by one vendor. SASE securely connects users and devices with applications. It supports branch office, remote worker and on-premises general internet security, private application access and cloud service consumption use cases.
Gartner defines zero trust network access (ZTNA) as products and services that create an identity and context-based, logical-access boundary that encompasses an enterprise user and an internally hosted application or set of applications. The applications are hidden from discovery, and access is restricted via a trust broker to a collection of named entities, which limits lateral movement within a network.