Cryptocurrency Exchanges Rely on Proof of Reserve for Transparency

Proof of Reserve (PoR) is a solvency check that uses cryptographic proof to verify that customer funds are held in their entirety by cryptocurrency exchanges.

This system relies on the transparency of blockchains, which allows users to track on-chain balances and verify wallet addresses. PoR reports typically include Merkle tree verification, which calculates customer liabilities without exposing individual data.

The use of independent auditors has become increasingly common, replacing self-reported numbers with a more reliable third-party assessment. Users can also check if their own balance was included in the audit report, promoting transparency and accountability within exchanges.

While PoR has improved exchange transparency, it's not without its limitations. One major issue is that reports only capture a single moment in time, leaving room for 'reserve washing' where funds are borrowed briefly before an audit to create a false appearance of solvency.