Why Encrypted Connections Matter for a Zero Trust Strategy

A company rolls out multifactor authentication, tightens employee permissions and introduces device checks before anyone can access its internal applications. The security team is pleased with the progress. Then someone asks whether the business still needs encrypted network connections.

It's a reasonable question. Zero Trust has changed how organizations think about access, especially when employees work remotely and applications span cloud services.

But verifying a user's identity doesn't automatically protect the information traveling between their device and the systems they're using. These are different security problems, and both deserve attention.

Zero Trust Changes Who Gets Access

Traditional network security relied heavily on the idea of a trusted internal environment. Once someone connected to the corporate network, they could often reach several systems without facing additional checks.

That arrangement becomes risky when an account is compromised, or an attacker gains access through an infected device.

Zero Trust takes a different approach. As IBM explains in its overview of Zero Trust, access decisions should consider identity, devices and other relevant conditions rather than automatically trusting someone because they're already inside the network.

For example, a payroll employee might be allowed to open financial records but have no reason to access development servers. That restriction should apply whether they're sitting at headquarters or working from home.

Encryption Still Has a Job to Do

Access controls decide whether to allow a connection. Encryption protects information while it travels.

Consider an employee connecting from an airport lounge to review confidential business documents. The application might require authentication and check the device before granting access. Those checks matter, but so does protecting network traffic over a connection the company doesn't manage.

For smaller organizations, a small business vpn can provide an encrypted tunnel between an employee's device and a VPN server. This helps protect traffic on unfamiliar networks and can form part of a remote-working security policy.

There are limits, though. A VPN doesn't automatically make the device trustworthy, inspect every application for suspicious behavior, or restrict which business files an authenticated user can open.

And where applications already use HTTPS, that traffic is encrypted independently of the VPN. The additional protection and network routing provided by a VPN should be assessed against the company's actual risks.

A Secure Tunnel Doesn't Mean Unlimited Trust

Imagine a contractor who needs access to one internal application for a two-week project.

Giving that contractor broad access to the corporate network creates unnecessary exposure, even if the connection is encrypted. If an attacker steals their credentials, they may be able to explore systems unrelated to the assignment.

A better arrangement limits access to the specific application and removes it when the project ends.

This is where Zero Trust Network Access, or ZTNA, becomes relevant. Instead of opening large sections of a network, ZTNA applies access policies to individual applications and considers the user's identity and device status.

VPNs and ZTNA therefore address overlapping but different needs. Some businesses may use both, especially when older internal systems still rely on traditional network connectivity.

Don't Forget the Device at the Other End

Encrypted traffic won't stop malware already running on an employee's laptop from reading a document after it decrypts it.

Security teams still need endpoint protection, timely software updates and procedures for identifying compromised devices.

The same applies to account security. Multifactor authentication reduces the risk of stolen passwords being used successfully, while regular permission reviews help prevent former employees or contractors from retaining access.

CyberLad examines these distinctions in its article on ZTNA, including where each approach fits into modern network security.

For organizations planning a transition, the useful question is which controls cover each system, rather than whether one technology should replace everything else.

Build Around Real Connections

Start by examining how people actually reach company resources. Which applications are public-facing? Which require private network access? Are employees using managed devices, and what happens when someone connects from an unfamiliar location?

The answers will differ between a ten-person consultancy and a business operating multiple offices, servers and cloud platforms.

Zero Trust provides a framework for making access decisions. Encryption remains one of the tools for protecting the connections those decisions allow.

A properly authenticated user and a protected communication channel solve different parts of the same problem. Good security planning makes room for both.