SASE vs. CASB: What's the Difference?


Security has become a major challenge as the world undergoes a transformative change in working. Flexible, cloud-based network security technologies like SASE and CASB provide a solution to this.

These technologies give security teams visibility and control over data that has moved off premises and is now accessible from anywhere.

The pandemic drove companies all around the world to digitally adapt their operations to stay in business. 

As a result, many companies have implemented virtual private networks (VPNs) to connect remote workers to the company's main network and have soon realized that VPNs are riddled with problems. 

VPNs can not handle remote operations. Bottleneck traffic is a common issue that can dramatically impair productivity and expose a company’s network to a number of security risks.

Therefore it became necessary to adopt a cloud-first, zero-trust solution in order to accommodate changing business needs. This necessitated the use of security controls like SASE and CASB. 

CASBs, cloud access security brokers, and SASE, secure access service edge, are favored by enterprises serious about their network and security.

Let’s look at what CASB and SASE are, and then we will look at the key differences.

What is a CASB?

What is a CASB

Initially, the focus of CASBs was on cloud visibility. This made it possible for businesses to find out about shadow IT. However, CASBs have expanded their offerings to include a wide variety of features, which can generally be categorized as visibility, compliance, threat protection, and data security. 

CASBs are software that can be hosted on-premises or in the cloud, and they are responsible for enforcing compliance, security, and regulatory safeguards across data and cloud applications. 

The cloud access security broker (CASB) is becoming an essential part of the enterprise security stack. 

Features of CASB

  • Detection of shadow IT and the risks it poses. 

  • Protect the data stored in the cloud by prohibiting specific categories of sensitive data from leaving trustworthy cloud services through file-sharing and email. 

  • Implement varying degrees of data access and capability for cloud services depending on the type of device, location, and software that is being used by the end user. 

  • Identify suspected cloud service misuse, including both internal and third-party activity that compromises user accounts.  

  • Use encryption that is controlled by the company, not the cloud provider, to keep corporate information in the cloud safe. 

  • Audit the way cloud services, are set up to find misconfigured settings and user accounts with too many permissions that leave data vulnerable to being stolen.

What is SASE?

What is a CASB -1

SASE is a cloud-based IT architecture that combines software-defined networking and network security tasks and delivers them from a single service provider. This model combines numerous network technologies and provides them in the form of service. 

It integrates network and security capabilities into a single platform. It allows enterprises to provide both security and access to the users and data. SASE accomplishes this regardless of location, all while preserving visibility and control.

SASE solutions give businesses the opportunity to connect to a single secure cloud network offered as a service, allowing them to access both physical and virtual resources. 

The technologies, ZTNA, CASB, SWG, etc., are not new as such, but the convergence of these solutions in one product offering and single point of control is.

SASE offers a more comprehensive and adaptable solution for business networking as well as multilayered protection for enterprises. A network redesign and the retirement of outdated networking and security technologies may be necessary to use SASE.

SASE makes IT infrastructure easier to manage, update, and maintain by cutting down on the number of security products your IT team has to keep track of.

Features of SASE

  • SASE provides a converged network that is consistent, agile, and holistic. 

  • It reduces or eliminates the need for specialized hardware or security appliances because SASE is delivered as a service. 

  • Converged networking and security help organizations reduce the number of devices and providers they must deal with, lowering operational costs and bringing cost optimization. 

  • When used in conjunction with SD-WAN, it improves security and network efficiency by combining automated traffic optimization and continuity. 

  • SASE can be used for both private and public cloud resources. However, it is most commonly used for remote locations, mobile, and IoT devices.

  • Security is improved by employing a Zero Trust strategy. A SASE solution is expected to provide comprehensive session protection regardless of whether a user is connected to the corporate network or not. 

  • Reduced reliance on business data centers by gradually migrating applications to the public cloud.


Zluri Can Do So Much More Than CASB/SASE in Securing Your SaaS Landscape

Zluri, a SaaS management platform, has advantages over CASBs for securing software as a service (SaaS), despite the fact that CASB solutions are a good solution for securing infrastructure as a service (IaaS) and platform as a service (PaaS) platforms.

Zluri has the following advantages over CASBs:

  1. Remote-first approach: CASBs primarily filter the data through logs (network packets, firewall, secure web gateways, endpoints) via deep packet inspection (DPI). Though this might work in the office environment, where the data can be controlled by flowing through the determined network, this is not enough for today's modern remote world. Users can now access applications on the internet without going through a specific network. Furthermore, the logs are never exhaustive in nature. 
    On the other hand, Zluri, being connected to the source—the application itself, never misses any data, and the accuracy is high too.

  2. Integration: Zluri has deep integrations with 750+ applications, including SSO (a few CASB and SIEM integrations, including MCAS, are under development), along with browser and desktop agents. We ensure to discover all the applications fully—both approved and unapproved (shadow IT) apps used by an employee.

  3. Multiple sources for shadow IT discovery: To provide 100% coverage, Zluri has multiple sources of information. 

5 discovery methods

We prefer to get the data directly from the application, including the usage and access data for each employee across multiple devices and multiple network connections. This is our preferred source of truth. 

Another source of data is the point of source; hence we focused a lot on the browser extensions and desktop agents. These are optional for the users. Though we can also get the activity and usage data of applications used on the device, we don't send out any data over the network via our desktop agents.

The third option is to get the data via connected systems like SSO, CASB, SWG, finance and expense management systems, etc., which gives us a secondary source of information on the usage and activity to discover the applications.

4. Application coverage: Zluri discovers SaaS apps with a massive portfolio of 2,25,000 known applications that keep on expanding at a much faster rate as new apps hit the market. Because of the multi-source approach, Zluri can also help companies discover internal applications and track their usage and activity. 

This number is ten times more than MCAS's catalog, a CASB solution! In addition, with our 750+ deep direct API integrations, you get a plethora of information on the number of licenses, type of access being shared, security scopes, insecure connections, billing cycles, important metrics, etc., apart from just the access and usage data.

Zluri is built for the SaaS world where users can use any device, and we shall get information across each one since we do not solely rely on agent-based sources (with direct integrations on SSO and applications).

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