What is Tamper-Evident Log?
A log built so that quietly changing the past is impossible to hide - the basis of trustworthy records.
Tamper-Evident Log: definition
A log is only as trustworthy as its resistance to quiet editing. Tamper-evident logs are typically append-only and use cryptographic techniques (like hash chaining) so that altering any past entry breaks the chain and is immediately detectable. They do not necessarily prevent tampering, but they make it evident - which is what an auditor, investigator, or regulator needs to rely on the record.
- Append-only: entries are added, not edited or deleted in place
- Cryptographic linking (e.g., hash chains) makes alteration detectable
- Trustworthy for audit, compliance, and forensics
- "Tamper-evident" (detectable) is often more practical than "tamper-proof"
How Fintra handles it
Fintra’s trust ledger is tamper-evident by design: consequential actions and approvals are appended with integrity protection, so the evidence you present for SOC 2, HIPAA, or the EU AI Act cannot have been silently altered after the fact. This is what elevates Fintra’s audit trail from a mere log to defensible, producible evidence.
Worked example
Frequently asked questions
What is the difference between tamper-evident and tamper-proof?
Tamper-proof implies alteration is impossible; tamper-evident means alteration is detectable. In practice, tamper-evident is the achievable and useful property - you may not be able to prevent every change, but you can guarantee any change is caught, which is what makes the record trustworthy.
How does a tamper-evident log work?
Typically it is append-only and cryptographically links each entry to the previous one (for example via hash chaining), so modifying any past entry invalidates the chain from that point forward and is immediately detectable. Deletions and edits cannot pass unnoticed.
Why do compliance and audit rely on tamper-evident logs?
Because evidence that could have been quietly edited proves nothing. Auditors, investigators, and regulators need assurance that the record they are reviewing is complete and unaltered. Tamper-evidence provides that assurance, turning a log into defensible evidence.
Is Fintra’s trust ledger tamper-evident?
Yes. Fintra’s trust ledger appends consequential actions and approvals with integrity protection, so the compliance and governance evidence it produces cannot have been silently altered - making it defensible for SOC 2, HIPAA, and EU AI Act purposes.
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