Classical Cryptography Simulator

Digital Signatures

Learn digital signature creation and verification. Understand RSA, DSA, and ECDSA with step-by-step mathematical operations and real-world applications.

Digital Signature Generation
Create a digital signature for your message

Rivest-Shamir-Adleman digital signature

Digital Signature Verification
Verify the authenticity of a signed message
Control Panel
Digital Signature Properties
Essential characteristics of digital signatures

Authentication

Verifies the identity of the signer

Integrity

Ensures message hasn't been altered

Non-repudiation

Signer cannot deny having signed

Binding

Signature is bound to specific message

Algorithm Comparison
Security and performance characteristics
AlgorithmKey SizeSecuritySpeed
RSA2048-4096HighSlow
DSA2048-3072MediumMedium
ECDSA256-384Very HighFast
Digital Signature Applications
Where digital signatures are used in practice

Software Security

  • • Code signing
  • • Driver verification
  • • App store security

Financial Systems

  • • Online banking
  • • Credit card transactions
  • • Stock trading

Legal Documents

  • • Contracts
  • • Email authentication
  • • Government forms