PKI and Certificates
Issue, rotate and revoke the digital certificates that authenticate your users, devices, websites and APIs.
Digital certificates prove trust between users, devices and services
Certificates quietly secure your websites, VPNs, Wi-Fi and encrypted connections. When they expire or drift out of ownership they cause outages, security gaps and awkward customer conversations.
- Avoids surprise outages when a certificate expires
- Underpins stronger authentication and encryption
- Protects the trust your customers place in your brand
- A live inventory of every business certificate
- Expiry monitored with alerts weeks in advance
- Clear ownership so nothing falls between teams
Do you know which certificates are critical to your business and when they expire?
Ask us to review certificate ownership and renewal risk.
Understanding pki & certificates
Certificates underpin almost every secure communication on your network - HTTPS, Wi-Fi authentication, VPN, email signing, S/MIME, code signing and device identity. When they expire unexpectedly, services break. When they're issued sloppily, attackers walk through them. We run PKI as a managed lifecycle so renewal, revocation and inventory are never an accident waiting to happen.
- Cyber Essentials & Cyber Essentials Plus
- ISO 27001:2022 Annex A controls
- NCSC 10 Steps to Cyber Security
- CIS Critical Security Controls v8
What we deploy and run
The concrete controls Telappliant configures, manages and reports on.
PKI & Certificates as run by a UK SOC and engineering team.
Certificate inventory across public and private CAs.
Automatic renewal monitoring with alerts long before expiry.
Microsoft AD CS or Entra certificate-based auth for internal services.
Managed public certificates via DigiCert / Sectigo for customer-facing sites.
Certificate-based device authentication for Wi-Fi (EAP-TLS) and VPN.
Revocation procedures tested and documented.
Why Telappliant
What you get with us that you don't get with the alternatives.
Delivered by a UK SOC and engineering team - no offshored ticketing.
Vendor-agnostic. We pick the right tool for your estate, then run it for you.
Mapped to Cyber Essentials, ISO 27001 and the NCSC 10 Steps from day one.
Fixed monthly price - no surprise hourly bills when something goes wrong.
The outcomes for your business
What changes for your team, your auditors and your insurer.
No more outages from expired SSL/TLS certificates.
Stronger device authentication on Wi-Fi and VPN than shared passwords.
Cleaner audits - one certificate inventory, not a spreadsheet.
Lower risk of stolen passwords being usable on the network.
Measured outcomes, not promises
3000+ UK organisations served and 100000+ end users supported.
< 60 minute average response on security incidents.
4000+ tickets resolved every month with measurable first-time-fix rates.
Vendor-fluent, not vendor-locked
We pick the right tool for your estate, then run it for you.
Trademarks are the property of their respective owners. We have no affiliation unless stated on our partners page.
Use cases
How this capability fits at different scales.
Replace the team's shared Wi-Fi password with device certificates.
Roll out 802.1X EAP-TLS so only company devices reach the corporate VLAN.
Centralise certificate issuance for finance, e-signing and customer portals.
How this applies to organisations like yours
Recent situations we've worked through with UK businesses - find the one closest to yours.
Situation. Customer portal certificate expired on a Saturday, taking the trading desk offline until Monday.
Outcome. Centralised certificate inventory with 60/30/7-day expiry alerts; zero outages in 12 months since.
Situation. Needed mutual TLS between API gateways for an NHS Digital integration but had no internal CA.
Outcome. Stood up an ADCS-based private CA, issued machine certs via Intune, integration live in two weeks.
Situation. Wi-Fi onboarding for 800 BYOD devices was a manual nightmare with shared passwords.
Outcome. Certificate-based 802.1X via SCEP - students enrol once, no shared password, far fewer helpdesk tickets.
Situation. Code-signing keys lived on a developer laptop, failing the first enterprise customer's security review.
Outcome. Hardware-backed code signing with audit trail; enterprise procurement gate cleared.
Common questions
Related fundamentals & services
Microsoft 365 Security Hardening
Most SMEs already pay for the controls that cover pki & certificates. We help you turn Microsoft 365 Business Premium into a real security baseline - the front door into the wider Cyber Fundamentals portfolio.
Explore Microsoft 365 hardeningTalk to us about pki & certificates
A 30-minute call to scope what good looks like in your estate.
Talk to a UK technology partner who's done this for 20 years
Book a practical, no-pressure consultation. We'll review your current setup, show where AI communications, cloud telephony or managed IT could improve customer experience and reduce admin - and tell you straight if you don't need us.
- UK-based people, real account management
- Honest recommendations - even if it's not us
- Practical AI where it adds value, not hype
