LESSON 2 · Under the Hood: How the Internet Works
Cloud Security Essentials
Your data in the cloud is only as secure as the practices you follow. Most breaches happen because users left data misconfigured or unprotected, not because the provider was hacked.
With standard encryption at rest, the provider holds the keys, so it can unlock your files if it is breached or legally compelled. Zero-knowledge encryption flips that: only you hold the key, and the provider stores data it genuinely cannot read. Services like Tresorit work this way.
The trade-off is real. There is no password reset for a key only you control — lose it and the data is gone for good.