# What is Security Service Edge (SSE)?

> Security service edge (SSE) is an architecture and service model that delivers multiple network-security capabilities — usually from cloud-based points of presence — to protect access to the web, software-as-a-service platforms, and private applications.

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## Content

Common capabilities include secure web gateway, cloud access security broker, zero trust network access, firewall as a service, threat protection, and data controls, although actual bundles vary.

The goal is to apply coordinated policy to distributed users, devices, branches, and applications without forcing every session through a traditional headquarters perimeter. Useful integration involves shared identity and device context, compatible policies, consistent telemetry, and deliberate traffic steering — not merely purchasing several services from the same supplier.

### Key points

- **Access coverage:** Examine internet and web traffic, SaaS use, and private-application access separately; a product may be strong in one path and limited in another.
- **Policy context:** Integrate identity, device posture, destination, data sensitivity, risk, and session behavior where the use case requires them.
- **Architecture questions:** Validate point-of-presence locations, latency, data residency, connector design, TLS inspection, failure behavior, logging, APIs, and exit arrangements.
- **Operating dependency:** Endpoints, identity systems, DNS, service connectors, network paths, and the SSE provider all become parts of the security and availability chain.
- **Important limitation:** SSE does not make an application, endpoint, or identity trustworthy, and a cloud-delivered control can still have blind spots, outages, configuration errors, and concentration risk.

### Related terms

[Secure access service edge (SASE)](<https://yellowcube.eu/glossary/secure-access-service-edge/>) · [Zero trust network access (ZTNA)](<https://yellowcube.eu/glossary/zero-trust-network-access/>) · [Secure web gateway (SWG)](<https://yellowcube.eu/glossary/secure-web-gateway/>) · [Cloud access security broker (CASB)](<https://yellowcube.eu/glossary/cloud-access-security-broker/>) · [Firewall as a service (FWaaS)](<https://yellowcube.eu/glossary/firewall-as-a-service/>)

### Sources

[GSA: Zero Trust Architecture Technology Book](https://buy.gsa.gov/api/system/files/documents/zero-trust-architecture-tech-book-508c.pdf) · [NIST SP 1800-35: Implementing a Zero Trust Architecture](https://csrc.nist.gov/pubs/sp/1800/35/final) · [NIST NCCoE: Example SSE Implementation](https://pages.nist.gov/zero-trust-architecture/VolumeC/HowTo-E2B5.html)

## Attribution and scope

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