Audit trails for electronic financial transactions

A system comprising:

• one or more processors;
• a storage device;
• secure non-volatile memory;
• a network interface;
• and
• circuitry configured
• to transmit via the network interface, at least a currency amount in an attempt to confirm a financial transaction;
• to receive a confirmation indicator for the financial transaction;
• to store at least the currency amount in the storage device;
• to hash at least the currency amount to generate a hash and to store the hash in the secure non-volatile memory;
• to hash at least the currency amount stored in the storage device to generate a verification hash;
• and,
• in an attempt to verify at least the financial transaction, to compare the verification hash to the hash stored in the secure non-volatile memory.

One or more computer-readable media comprising processor-executable instructions to instruct a processor to:

• hash at least a currency amount for each of a plurality of financial transactions;
• access, according to a security protocol, a secure hash stored in secure, non-volatile memory;
• and
• issue an alert if the hash does not match the secure hash.