What End-to-End Encryption Actually Protects (And What It Doesn'''t)

What end-to-end encryption protects — and what it misses — is one of the most important distinctions in practical security. This is a technical breakdown. The Precise Definition End-to-end encryption (E2EE) means a message is encrypted on the sender's device, travels encrypted through all intermediaries, and is decrypted only on the recipient's device. No server in the path — not the service provider's infrastructure, not your ISP — can read the content. This is genuinely powerful. Even if Signa