VPN Encryption Explained
From AES-256 to quantum-resistant Kyber1024 — understand how encryption keeps your data safe and why it matters more than ever.
In this guide
What Is Encryption
Encryption transforms readable data into unreadable ciphertext using mathematical algorithms and keys. Only someone with the correct key can decrypt the data. VPNs encrypt all traffic between your device and the VPN server.
AES-256 Encryption
AES-256 (Advanced Encryption Standard with 256-bit keys) is the gold standard used by governments and military organizations worldwide. It would take billions of years for current supercomputers to brute-force a single AES-256 key.
ChaCha20 Encryption
ChaCha20 is a stream cipher used by WireGuard. It is faster than AES on devices without hardware AES acceleration (like mobile devices) while providing equivalent security. CasperVPN uses ChaCha20 with WireGuard protocol.
Quantum-Resistant Kyber1024
Quantum computers could break current encryption standards. CasperCloak uses Kyber1024, a post-quantum key encapsulation mechanism standardized by NIST, to protect against future quantum threats. Your data encrypted today remains safe even when quantum computers arrive.
Frequently Asked Questions
Is AES-256 still secure in 2026?
Yes, against classical computers. However, quantum computers may eventually break it. CasperCloak with Kyber1024 provides an additional layer of protection against this future threat.