Posted: 4 Min ReadFeature Stories

SASE - New Architecture for A New Era

Symantec Enterprise looks toward the future

What is the expected life of a cyber security architecture? While they don’t come with warranties, a decade or more is a long run. But nothing digital is set in stone. The classic paradigm of guarding data centers and network perimeters has run its course—a victim of too many costly intrusions and a perceived inability to meet the requirements of digital transformation, mobile access, and cloud-native applications.

In its place, our industry is rapidly coalescing around Secure Access Service Edge (SASE), a cloud-based security architecture that prioritizes data protection over hardware or even company networks. SASE combines networking and security-as-a-service capabilities.

If that sounds like a major shift, we concur, and we’re leading the way. What do you need to know to start this journey? And what is your action plan?

In this post, the first in a planned series about SASE architecture, we’ll recommend where to start and discuss where this fits into a broader set of solutions. Of course, with a new architecture, the focus shifts from fixing legacy problems to solving for the challenges of where computing is headed: to the cloud and the edge.


In the 5G-powered, edge processing world of the near future, applications are latency-sensitive and data flies around at speeds 100x greater than today. This requires a lot of computing resources, bandwidth, all while being fully secured. Information must be instantaneously encrypted and decrypted as it shifts from edge to data lake, and again when it is replicated in a cloud-based data set for an entirely different purpose, such as training or business analytics.

Protecting data in flight between endpoint and service is one of the primary objectives of SASE. If you make a strategic shift from protecting data centers to controlling centers of data, it’s worth asking, what’s the difference?

Protecting data in flight between endpoint and service is one of the primary objectives of SASE.

According to Gartner, “Network security architectures that place the enterprise data center at the center of connectivity requirements are an inhibitor to the dynamic access requirements of digital business.” The alternative they advocate, per our view, is consolidating networking and security-as-a-service capabilities into SASE. Secure access cloud services must not be landlocked by company networks or hamstrung by backhaul connections through corporate data centers. 

In SASE, security policies are tied to validating identities rather than the protection of IP addresses—and identities are no longer based on location. Establishing control over whom and what accesses cloud-based services becomes your first mission particularly when it is key to enforcing security when it is in another infrastructure.

First Comes the Proxy

You cannot protect a digital business without first establishing both visibility and control over all web traffic. To achieve this, you need a single termination layer to process this traffic. Since the majority of all web traffic is encrypted, your termination layer must also support the ability to handle encrypted traffic to preserve visibility and control. Once web traffic has been decrypted, you can block malware and other malicious threats, apply security policies, and enforce data compliance requirements. We know this because we have literally decades of experience with proxy protection. Our Secure Web Gateway (SWG) enables in-depth inspection of web and encrypted web traffic required to uncover and protect against the web threats that may target your organization.

If SWG sees a potential issue, it may send the payload to a data loss prevention (DLP) solution, or to a sandbox for behavioral analysis, detection and remediation. A proxy is perfectly positioned to handle encrypted traffic. Decrypting SSL requires negotiating and completing a full SSL/TLS handshake, which can create issues for non-proxy solutions. With the advent of TLS1.3, managing encrypted traffic is further complicated for non-proxy architectures, such as NGFWs, since there is no way to fully inspect the initial TLS handshake.

Secure Web Gateways take a giant first step toward SASE because it provides: 

  • Cyber attack prevention and detection: Implements white lists and black lists; works with DLP and sandboxing tools; considers file reputation analysis
  • Visibility into all web traffic: Monitors and logs transactions; supports cloud apps to ensure compliance
  • Lower total cost of ownership (TCO) for security: It improves the overall performance and availability of your business apps and media, with bandwidth management, content caching, traffic optimization, and streaming media splitting and caching features

In upcoming posts, we’ll discuss our understanding of the Gartner-recommended SASE journey, which includes:

  • SWG (this post)
  • SSL Decrypt
  • DLP 
  • CASB
  • CFS
  • SD-WAN
  • ZTNA
  • Continuous Session Risk Monitoring
This graphic was published by Gartner, Inc. as part of a larger research document and should be evaluated in the context of the entire document. The Gartner document is available upon request from:
This graphic was published by Gartner, Inc. as part of a larger research document and should be evaluated in the context of the entire document. The Gartner document is available upon request from:

Will every organization adopt SASE? Gartner projects “By 2024, at least 40% of enterprises will have explicit strategies to adopt SASE, up from less than 1% at year-end 2018.” While adoption is gaining momentum, SASE may take half a decade or longer to become the predominant cyber security architecture. Some of the pieces, such as SWG, are more mature than others. The Symantec portfolio of SASE solutions will act in harmony to provide industry-leading architecture that meets or exceeds your security KPIs.


Gartner does not endorse any vendor, product or service depicted in its research publications, and does not advise technology users to select only those vendors with the highest ratings or other designation. Gartner research publications consist of the opinions of Gartner's research organization and should not be construed as statements of fact. Gartner disclaims all warranties, expressed or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose.

Source: Gartner “The Future of Network Security Is in the Cloud,” Neil MacDonald, Lawrence Orans, Joe Skorupa, 30 August 2019.

About the Author

Network Protection Team


The Network Protection Team is a group of security experts within Symantec whose mission is to create network software solutions, drive enhanced protection in Symantec products, and offer analysis that helps customers respond to attacks.

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