Monero Replaces Ring Signatures With Full-Chain Membership Proofs

The reported change would expand Monero’s anonymity set from 16 participants to more than 150 million outputs, strengthening transaction privacy in the privacy-focused cryptocurrency network.

XMR

Summary

Monero, a privacy-focused cryptocurrency, is reported to be replacing ring signatures with full-chain membership proofs, a cryptographic method intended to prove a transaction input belongs to a larger set without revealing which one it is. According to the provided update, the shift increases the anonymity set from 16 to more than 150 million outputs. In privacy-preserving blockchain systems, a larger anonymity set generally makes transaction tracing more difficult because each transaction can blend into a much broader pool of possible outputs. The change therefore points to a significant upgrade in Monero’s privacy model.

Terms & Concepts
  • Ring signatures: A privacy mechanism that hides the real signer among a small group of possible signers, making it difficult to determine which participant authorized a transaction.
  • Full-chain membership proofs: A cryptographic proof system that can show a transaction output belongs to a much larger blockchain-wide set without revealing the specific output being spent.
  • Anonymity set: The group of possible transaction participants or outputs a real transaction could be confused with; a larger set generally improves privacy.