Kyber - Quantum-Safe Key Exchange

Kyber is a lattice-based key encapsulation mechanism (KEM) that is secure against attacks by quantum computers.

Generate Kyber Keys

About Kyber Security Levels

Kyber offers different security levels to balance security and performance:

  • Kyber-512: NIST Level 1 security (equivalent to AES-128)
  • Kyber-768: NIST Level 3 security (equivalent to AES-192)
  • Kyber-1024: NIST Level 5 security (equivalent to AES-256)

Higher security levels provide stronger protection but require more computational resources and bandwidth.

Encapsulate Key with Kyber

Generate a shared secret using recipient's public key

Decapsulate Key with Kyber

Recover the shared secret using your private key

About Kyber

Kyber is a lattice-based key encapsulation mechanism (KEM) that was selected by NIST as the first standardized post-quantum key establishment algorithm. It was designed to be secure against attacks by both classical and quantum computers.

Key Features:
  • Post-Quantum Security: Resistant to attacks by quantum computers, unlike traditional algorithms like RSA and ECC
  • Efficiency: Offers good performance in terms of key size, computation time, and bandwidth requirements
  • Standardization: Selected by NIST as the first post-quantum key establishment algorithm for standardization
  • Flexibility: Provides multiple parameter sets for different security levels
How it Works:

Kyber is based on the hardness of the Module Learning With Errors (MLWE) problem, which is believed to be resistant to quantum attacks. The algorithm consists of three main operations:

  1. Key Generation: Creates a public key and private key pair
  2. Encapsulation: Uses the recipient's public key to generate a shared secret and an encapsulation (ciphertext)
  3. Decapsulation: Uses the recipient's private key and the encapsulation to recover the shared secret
Applications:

Kyber can be used in various cryptographic protocols that require key exchange or key establishment, such as:

  • TLS (Transport Layer Security) for secure web browsing
  • SSH (Secure Shell) for secure remote access
  • VPNs (Virtual Private Networks) for secure communication
  • Secure messaging applications
Note: Kyber is designed specifically for key exchange and cannot be used directly for encryption or digital signatures. For those purposes, other post-quantum algorithms like NTRU (encryption) or Dilithium (signatures) should be used.