Dilithium - Quantum-Safe Digital Signatures

Dilithium is a lattice-based digital signature algorithm designed to be secure against quantum computer attacks.

Generate Dilithium Keys

About Dilithium Security Levels

Dilithium offers different security levels to balance security and performance:

  • Dilithium2: NIST Level 2 security (roughly equivalent to AES-128)
  • Dilithium3: NIST Level 3 security (roughly equivalent to AES-192)
  • Dilithium5: NIST Level 5 security (roughly equivalent to AES-256)

Higher security levels provide stronger protection but result in larger signatures and keys.

Sign Message with Dilithium

Verify Signature with Dilithium

About Dilithium

Dilithium is a lattice-based digital signature algorithm that was selected by NIST as a standard for post-quantum digital signatures. 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 DSA
  • Efficiency: Offers reasonable performance in terms of key size, signature size, and computation time
  • Standardization: Selected by NIST as a post-quantum digital signature algorithm for standardization
  • Flexibility: Provides multiple parameter sets for different security levels
How it Works:

Dilithium is based on the hardness of the Module Learning With Errors (MLWE) and Module Short Integer Solution (MSIS) problems, which are 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. Signing: Uses the private key to generate a signature for a message
  3. Verification: Uses the public key to verify that a signature is valid for a given message
Applications:

Dilithium can be used in various cryptographic protocols that require digital signatures, such as:

  • Code signing for software distribution
  • Document signing for legal and business purposes
  • Certificate signing in PKI (Public Key Infrastructure)
  • Authentication in secure communication protocols
Note: Dilithium is designed specifically for digital signatures and cannot be used directly for encryption or key exchange. For those purposes, other post-quantum algorithms like NTRU (encryption) or Kyber (key exchange) should be used.