Hey there, my dear readers! Zero Trust is not just a short-term trend, but it has become an integral part of organizational security. In the contemporary landscape where cyber threats and enterprise networks are constantly evolving, Zero Trust is an important security building block. Even after the increasing focus on Zero Trust security, 90% of organizations have yet to achieve sophisticated cybersecurity as they face problems operationalizing Zero Trust security.
In order to segregate hype from real-world value, we will discuss what Zero Trust really means, why this mindset is more iportant that even and how it works practically.
Why Traditional Approaches Fail Against Modern Threats?
There are four bottlenecks of traditional security approaches that can be found from a security perspective.
Attack surface expansion: When it comes to design, traditional tools like VPNs and firewalls expose IP addresses to the public network. These IPs can be identified not just by legit users but also by malicious actors who target an attack surface.
Inefficient prevention of compromise: Past security is appliance-based, and whether security tools are implemented as hardware or virtual appliances, they face problems scaling as required to inspect protected traffic, where most threats reside. In turn, most attacks bypass the defenses undetected.
Lateral threat movement: Traditional approaches connect entities to the network to allow them access to the app. However, this involves implicit trust and excessive permissions that can be abused, allowing access to everything connected to that network and causing more dangerous breaches.
Failure to stop data loss: After infiltrating the network for critical data, malicious actors try to exfiltrate it. This is achieved through encrypted traffic because they know that most companies depend on appliance-based security, which will fail to secure said traffic.
What is Zero Trust Security?
Zero Trust security is a cybersecurity strategy that distrusts traffic automatically, even if it is already within the network. This approach upends conventional security measures by discarding implicit trust and requiring consistent verification. Instead of assuming internal traffic is trustworthy, Zero Trust assumes a breach.
In a nutshell, Zero Trust means no implicit trust, least privilege by default, continuous verification, containment and detection.
What are the Main Pillars of Zero Trust Security?
Zero Trust is a unique architecture that brings a very different paradigm and methodology to cybersecurity. The main pillars that are protected by Zero Trust include:
Identity: Verify who is accessing the system
Device: Check whether the device is compliant and reliable
Network: Categorize and isolate network traffic
Application: Control access to particular applications
Data: Encrypt sensitive information at rest and in transit.
By complying with these practices, Zero Trust allows companies to reduce risk, complexity, and better safeguard their distributed network.
How Does Zero Trust Security Work?
Zero trust is a unique approach wherein companies effectively have a smart switchboard that offers safe any-to-any connectivity without extending the network to anyone or anything. At its core, the internet becomes the new corporate network. Here is how the security works:
Starts with verification: Offering least-privilege access requires understanding who or what is attempting to access. Every user or entity trying to connect to an IT resource has its identity verified.
Identifies the destination: Zero Trust means connecting entities directly to their destinations instead of a network, which prevents lateral movement. After verification, the user can access the desired IT resource.
Calculates the risks: Identity alone is insufficient to manage access to IT resources. Hence, zero trust manages access based on risk that is determined through AI/ML that evaluates access context.
Enforces the policy: Policy is automatically imposed in real time and on a per-session basis, which means for every access attempt. Several actions can be enforced, including enabling, blocking, isolating, deceiving, etc. Even after the access is granted, continuous monitoring finds risk changes in real time and mends policy as required.
Creates a connection: Users are connected directly to the applications. Although the connection is inbound to SaaS and the web, private apps need an inside-out connection that is facilitated by an app connector, which reaches out to the zero trust cloud so that it can connect to the entire connection together. This discards the need for public IPs that expose apps.
With a zero trust security approach, all connections- regardless of whether initiated by users, systems, or devices- are inspected with the same scrutiny levels. This reduces the scope for malicious actors while ensuring legit users have a seamless and safe experience.
What are the Benefits of Zero Trust Security?
Zero Trust as an approach is well suited to modern IT environments compared to traditional security approaches. With such a large number of users and devices accessing internal data and with data stored internally and externally on the network, it is safer to assume that no entity is trustworthy.
The main benefit of incorporating Zero Trust principles is to help reduce the attack surface for the organization. Furthermore, Zero Trust reduces the impact when an attack occurs by limiting the breach to a small area through microsegmentation that reduces the cost of recovery. Zero Trust reduces the impact of user credential theft and phishing attacks by requiring multiple authentication factors. It helps discard threats that bypass conventional perimeter-oriented safeguards.
By verifying every request, Zero Trust security minimizes the risks posed by risky devices, including IoT devices that are often problematic to safeguard and update.
Real-World Use Cases
Zero trust principles can be used across multiple scenarios to address the different security needs of modern organizations. Some real-world use cases include:
User-centric use cases
Remote access without VPN: Allow users to safely and directly access private applications without exposing the network or depending on complex VPN connections.
Cloud security for SaaS apps: Extend zero trust policies to SaaS while confirming least-privileged access to business- crucial apps like Salesforce and Microsoft 365.
Encrypting sensitive data: Zero Trust platforms can offer data loss prevention feature which identifies and protect sensitive information in motion to the web.
Use cases for other entities
Securing workloads across multiple cloud environments: Workloads often interact with the web and other workloads. As part of safeguarding any-to-any connectivity, zero trust can safeguard these workload conversations to prevent risk contamination and data leaks.
IoT and OT security: Extend zero trust practices to branch sites, manufacturing plants and other industrial environments, safeguarding IoT and OT devices by enforcing least-privileged policy controls.
Third-party and partner access: Offer contractors, vendors and tech partners with safe, zero trust access to IT resources without risking your wider network and without using endpoint agents.
Common Pitfalls of Zero Trust Security and Solutions
Growing Zero Trust practices require navigating an area full of partial solutions, architectural trade-offs and empty promises. Some of the most common limitations associated with this approach are:
Use of Zero Trust as a Label, not a Capability: Multiple products rebrand existing technologies such as VPNs or firewalls as Zero Trust without delivering the internal enforcement or segmentation required to prevent threats. Actual zero trust requires both access control and prevention.
Depending entirely on ZTNA: Zero Trust Network Access is useful for external access control, but once a user enters, internal segmentation is important for ensuring attackers cannot move laterally.
Performance and visibility trade-offs in cloud-based ZTNA: Most tools work as a reverse proxy that directs traffic through the vendor’s cloud. This often introduces latency, increases bandwidth costs and breaks visibility for security monitoring tools.
Operational complexity when integrating ZTNA and microsegmentation: Even with robust solutions for both access control and segmentation, integrating policies, identity systems and enforcement points can be a great move. Without a centralized model, Zero Trust enforcement becomes fragmented and difficult to manage.
To address these pitfalls, companies require a solution that blends the speed of VPN with ZTNA security, illustrates comprehensive segmentation and integrates Zero Trust by delivering both microsegmentation and ZTNA under the same roof.
Best Practices of Zero Trust Security
Track network traffic and connected devices: Visibility and transparency are important for users and machines to be authorized and authenticated.
Update devices: Risks should be identified as early as possible. Zero Trust networks should restrict access to vulnerable devices.
Apply the least-privilege principle for everyone: From executives to IT teams, everyone should have restricted access. This reduces the impact if an end user account is compromised.
Break the network: Breaking the network into smaller fragments helps ensure breaches are identified earlier before they can spread.
FAQs
What is the main idea behind Zero Trust security?
Zero Trust is based on the principle of ‘never trust, always verify’. Compared to conventional approaches, Zero Trust assumes that threats exist both inside and outside the network. Hence, every individual and device should undergo stringent identity verification before having access to resources, irrespective of their location or connectivity status.
What is least-privilege access?
Least-privilege access requires allowing permission to a minimum level to perform their particular jobs. By limiting the permissions, an organization can reduce the amount of confidential data exposed if a single user account is compromised.
Why is multi-factor authentication important for Zero Trust?
MFA requires users to provide at least two different pieces of evidence to verify their identity, like a password and a code sent to a mobile device. This adds an extra layer of security.
What is Zero Trust Network Access (ZTNA)?
ZTNA is the main technology used to adopt a Zero Trust architecture. It works by concealing internal infrastructure and developing safe, one-to-one encrypted connections.
