No anomalous login, no unusual volume, no malformed input — just a grammatical question, for three weeks.
Support systems accumulate whatever customers attach to tickets. Nobody plans for that.
A customer can change bank. An employee handed the details over as a condition of the job.
Each hop between merchant and issuer is a copy, and the cardholder chose none of them.
Someone who paid off their mortgage in 2016 had no account, no login, and full exposure.
The working exploit was published by its own execution, in a block anyone could read.
The count is exact to the person. The explanation is a two-day window and nothing else.
A voter who wrecks the protocol wrecks their own holding — unless the holding lasts one transaction.
No exploit, no malware. Someone kept reading what they had been allowed to read.
A quorum counts signatures. Security depends on the independence behind them, and code enforces only one.
No insurance, no reserve fund, no protocol mechanism. The guarantee was a company deciding to pay.
A control the server can be persuaded to skip is not a second factor. It is a convention.