Threshold Signatures

Benefits of Threshold Signature Schemes

Source: [1]

  1. Redundancy
  2. Corruption Resilience
  3. Key Rotation Threshold signatures allows key rotation, i.e., changing the secret key shares while keeping the public key constant. This is not possible in a single party setting.

Applications of threshold signatures

Source: [1] Applications of threshold signatures (generally wherever trusted signatures are needed):

  • Cryptocurrency wallets
  • Certificate authorities: The signing key of a CA is critical.
  • Consensus validators: To make signatures compact.
  • Code signing packages: Package managers signing packages and updates (App Stores, OS updates, etc.)

Some applications use: two out of three (e.g., cryptocurrency wallets)