Zero-Knowledge

Zero-knowledge (also "no-knowledge") describes a security model in which the provider itself has no access to your content. Your data is encrypted on your device, and only you hold the key or master password ✕ The master password is the one password that unlocks your password manager. It protects all the others — and must never be lost. More in the glossary → — the provider doesn't store it. As a result, not even the provider, an employee, or an attacker with server ✕ A server is a powerful computer that provides data or services to other devices — for example serving a website or storing your cloud files. More in the glossary → access can read your files. It's the gold standard for secure cloud ✕ "The cloud" refers to services and storage that run not on your device but on external servers on the internet. You can access them from anywhere. More in the glossary → storage and password managers. The downside: if you lose your master password, you usually lose access too. Find zero-knowledge providers in the best cloud storage comparison.