- Zero trust means never trust by default, always verify identity and device, and give each user only the access they need.
- For billing systems, strict access limits and MFA reduce the risk of stolen passwords, overexposure, and costly payment data breaches.
- Verify security with proof: current compliance reports, fast access removal, enforced MFA, audit logs, and vendor controls.
Zero trust is a security approach built on three ideas: never trust by default, always verify, and give every person the least access they need. For a biller, it means every employee and vendor who touches your payment systems is verified each time and limited to only what their job requires.
When I first built remote access to my home lab on linux-based IPTables firewall, I had it working in about ten minutes. Open a port, point it at a machine, log in from anywhere. It felt great, right up until I realized what I had actually built: one password standing between the open internet and everything I cared about.
So, I started over. First came mandatory SSH keys, which is a single, hardened front door that every connection must pass through, with every visit logged. Then I moved to Twingate, which changed the question entirely. Instead of asking “are you on my network?” it asks, “who are you, what device is this, and are you approved for this one thing?” Every time. Nobody gets a free pass for simply being inside.
The lesson stuck with me: the easy version of access is almost never the safe version, and the safe version doesn’t have to be painful.
What Does Zero Trust Actually Mean?
Zero trust isn’t a product you buy. It’s a way of deciding who gets in. It rests on three principles:
- Never trust by default. Being on the network, or having logged in this morning, proves nothing on its own.
- Always verify. Identity and device are checked on every request, not once at the start. This is where single sign-on (SSO) and multi-factor authentication (MFA) earn their keep.
- Least privilege. Each person gets access to only what they need, for only as long as they need it.
Think of a hotel keycard. It opens your room, not every room, and it stops working at checkout, or once the next key is created. The old model of security is a master key that never expires.
Why Does Zero Trust Matter for Billing and Payment Systems?
Your billing environment holds some of the most sensitive information your organization touches: customer account details, payment histories, and bank information. And plenty of people need to work near it: your own staff, implementation partners, auditors, support teams, and software vendors. Each one is a door.
In plain business terms, here is what the three principles look like:
- Never trust by default means the contractor login from last quarter’s project shouldn’t still work today.
- Always verify means a stolen password alone isn’t enough, because a second check stands behind it.
- Least privilege means a customer service rep can look up an account balance without being able to export the full payment file, and a consultant fixing a reporting issue never sees settlement data.
This is more than an IT concern. For a CFO, it’s about limiting how far a single mistake or compromised account can travel. For an operations leader, it’s about keeping payments flowing without surprises. And for the residents, policyholders, and customers who pay you, it’s about trust. Payments are moments of trust, and how you protect access behind the scenes is part of that experience.
How Do I Verify That a Billing Partner Takes Security Seriously?
Security claims are easy to make and harder to verify. Whether you’re evaluating a new billing platform or reviewing a current one, five questions cut through the noise:
- What independent proof can you show me? Ask for a current SOC 2 Type II report and PCI DSS compliance documentation and check the dates. An old report is a story, not evidence.
- How is access granted and removed? You want a clear approval process and fast removal when someone changes roles or leaves.
- Is MFA required for everyone, or just available? “Optional” is not the same as “enforced.”
- Can you show who accessed what, and when? If a partner can’t answer, that’s an answer.
- Do your vendors meet the same standard? Your risk includes your partner’s partners.
What Can I Do This Cybersecurity Awareness Month?
October is Cybersecurity Awareness Month, a good excuse to do the unglamorous work that matters most.
You don’t need a new tool to start. You need a pencil and a good hour of your day:
- Make the list. Write down everyone, internal and external, who can reach your billing and payment systems today.
- Cut the list. Remove anyone who no longer needs access, and narrow anyone who has more than their job requires.
- Check the lock. Confirm MFA is enforced, not just offered, on every account that touches payment data.
That’s zero trust in practice. It started for me as a weekend tinkering project, and it applies just as well to the systems that keep a city, a utility, or an insurer paid. Done well, it’s invisible to the people paying their bills and a quiet source of confidence for the people running billing operations.
To hear more about how SSO and MFA fit together in practice, watch my session “Secure by Design: How Trustworthy Systems Fuel Digital Adoption.”
