What is encryption?
Encryption transforms data so only parties with the right keys can read or verify it—protecting traffic in motion and files at rest.
Three properties people mix up
- Confidentiality — outsiders cannot read the content.
- Integrity — tampering is detectable.
- Authenticity — you know whom you are talking to (within the trust model).
TLS in your browser and modern VPN tunnels aim at all three for the segments they cover.
Symmetric vs public-key
- Symmetric algorithms use the same key to encrypt and decrypt (fast for bulk data).
- Public-key cryptography uses key pairs to establish trust and share secrets without a pre-shared password on every packet.
VPNs typically use public-key handshakes, then symmetric encryption for the stream.
What encryption does not magically fix
Encrypted pipes can still leak timing, size, and destination metadata to some observers. Endpoints (apps, accounts, malware) can betray you after decryption. A VPN encrypts the path to its server; it does not encrypt the entire internet beyond that server.
Algorithms vs marketing
“Military-grade” is not a specification. Prefer named, reviewed protocols (WireGuard, TLS 1.3) and clear key management over adjectives. VeritasVPN uses WireGuard for the tunnel—see What is WireGuard?.