Crypto

Security & wallets

Proof of reserves, cold wallets, account security and incidents

Articles in this topic

Crypto

Ledger Theft Incident: Users Who Bought from Reseller CryptoBilis Lose Nearly US$90 Million. The Known Facts and the Checks to Run When You Set Up a Cold Wallet

JASON FINANCE

Last updated: October 9, 2026

Ledger theft: Ledger is investigating losses among users who bought from reseller CryptoBilis, put at over US$86 million. Known facts, official advice, checks.

Crypto

How to Check Proof of Reserves: What an Exchange's PoR Can and Cannot Prove, and the Latest Reserve Ratios at 14 Exchanges

JASON FINANCE

Last updated: October 9, 2026

How to check an exchange's proof of reserves: reserve ratios, what is in the reserves, Merkle trees and zk proofs, self-verification, limits, and 14 exchanges.