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What is encryption?

Published July 11, 2026 · Updated July 11, 2026 · 4 min read

Encryption is the quiet engine behind almost all online privacy, including Tor. The concept is simpler than it sounds.

Scrambling with a key

Encryption turns readable data into scrambled nonsense using a mathematical key. Only someone with the right key can turn it back. Without the key, intercepted data is useless gibberish.

Why it powers the dark web

Tor wraps your traffic in multiple layers of encryption so each relay only sees what it needs. And .onion addresses are themselves derived from cryptographic keys. Encryption is what makes the whole system private and self-verifying.

Encryption protects data in transit - but it cannot protect you from handing information to a scam site yourself.

Frequently asked questions

Is encryption legal?

Yes in most countries. It secures banking, messaging, and everyday web traffic.

Can encrypted data be read?

Not without the key. Strong encryption makes intercepted data unreadable.