At Momentum (a product by ltiora) ( https://ltiora.com/ ), we build retail and wholesale ERP software. One of the more interesting engineering problems we tackled was making our accounting ledger tamper-evident, meaning retroactive modification of historical financial records is cryptographically detectable.

The Problem

Most accounting software for SMBs treats historical records as editable data. An administrator with sufficient access can modify a past journal entry, and while most platforms log user actions, those logs are themselves editable. An employee with enough access can modify a transaction and remove the log entry that recorded it.

For retail businesses with multiple staff touching finances, this creates silent audit risk that most operators don't consider until they're in a dispute or undergoing due diligence.

The Solution: Hash Chaining

We applied the same integrity principle used in blockchain systems to each accounting entry.

When a journal entry is written:

We compute…