SASE (say "sassy") is one of those analyst-coined categories that sounds like pure jargon until you see the problem it solves. When work moved off the corporate network — to homes, cafes, and clouds — the old model of routing everything back through a headquarters firewall stopped making sense. SASE is the response: deliver both the network connection and the security controls from the cloud edge, close to wherever the user actually is.

Granted patents make the model concrete. Level 3 Communications holds US12519797B2, "Secure access service edge (SASE)" (issued January 6, 2026; CPC H04L 63/102 — access control), and US12425405B2, "Secure access service edge (SASE) scriptlets for providing SASE-based network services" (issued September 23, 2025). Read them at US12519797B2 and US12425405B2.

“Novel tools and techniques are provided for implementing network service ordering and provisioning of secure access service edge (“SASE”) software packages.”— U.S. Patent No. 12,519,797 source

The way this actually works is convergence at the edge. Instead of separate boxes for connectivity (SD-WAN) and security (secure web gateway, firewall, zero-trust access), SASE runs them as one cloud-delivered service. Policy attaches to identity and context, so the same controls apply whether the user is in the office or on hotel Wi-Fi. The "scriptlets" grant is the interesting one for the business: it describes programmable units that let SASE-based services be composed and customized — the platform's extensibility, claimed as IP.

One analogy, then gone: the old model was a castle with one guarded gate, and everyone had to travel back to the castle to be checked. SASE is more like giving every traveler a checkpoint that follows them — the inspection happens wherever they are, not where the building is.

Why this is a markets story: SASE is fundamentally a consolidation bet. It bundles what used to be five or six separate purchases into one subscription, and that bundling is exactly the strategic logic public security vendors keep describing — sell the platform, not the point product. The category's whole premise is that buyers want fewer vendors and one policy model. A carrier like Level 3 filing in this space signals that connectivity providers see the converged edge as their turf too, not just the security pure-plays'.

The grounded takeaway: SASE = network + security, delivered from the cloud edge, policy following the user. When a vendor pitches it, ask which functions are actually converged and how policy follows identity. The patents name the model — converged access control and programmable edge services — and that naming is more precise than the four-letter acronym suggests.