Glossary
Authentication
The process of checking that a person, device, or service is who or what it claims to be.
Why it matters
Weak authentication is still one of the fastest ways an account becomes someone else’s tool.
Related concepts
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Small Business Cybersecurity Checklist 2026
A practical 2026 checklist for micro and small businesses — access, updates, invoices, backups, people, and a 90-day starter plan.