Hash Chain
An ordered cryptographic dependency structure in which each record's hash is included as input when computing the hash of the next record. Tampering with any single record invalidates the hashes of all subsequent nodes, making hash chains a standard mechanism for integrity assurance in blockchains and audit logs.
Timeline (last 90 days)
True immutability must be embedded in the persistence layer, and any attempt at tampering leaves a detectable trace: the record's hash value changes, and the complete hash chain breaks.
The governed runtime adopts a fail-closed design: if the policy no longer allows that executor to resume, the run ends as failed with resume_denied before executing any step, writes a FlowFailed event to the hash chain, and notifies the user that resumption is no longer allowed.
A hash chain is a tamper-evident log structure: each record contains the cryptographic hash of the previous record, and any modification to any record causes all subsequent hash verifications to fail, thereby exposing tampering.
Tamper-proof auditing usually relies on hash chains or digital signatures; a hash chain links each log entry's hash value to the previous one, so any tampering breaks all subsequent hashes.
In the compliance sense, audit trails need to satisfy hard requirements such as immutability (usually implemented through append-only storage or hash chains), complete context (recording who triggered which operation at what time, in what identity, and based on what input), and traceability (the ability to restore the data state before and after an operation).
Hash chains provide tamper detection rather than tamper prevention, and typically still need to be combined with append-only storage or external witness mechanisms.
K-Dense BYOK records the process by observing what the agent actually does, with logs written to a location that the agent has no tool access to write to, forming a tamper-proof hash-chained record.
A hash chain is formed by concatenating the hash of each message with the hash of the previous message and hashing again, creating a chain structure where modifying any intermediate message invalidates all subsequent hashes.
All Facts (8)
True immutability must be embedded in the persistence layer, and any attempt at tampering leaves a detectable trace: the record's hash value changes, and the complete hash chain breaks.
50%UnverifiedThe governed runtime adopts a fail-closed design: if the policy no longer allows that executor to resume, the run ends as failed with resume_denied before executing any step, writes a FlowFailed event to the hash chain, and notifies the user that resumption is no longer allowed.
50%UnverifiedA hash chain is a tamper-evident log structure: each record contains the cryptographic hash of the previous record, and any modification to any record causes all subsequent hash verifications to fail, thereby exposing tampering.
50%UnverifiedTamper-proof auditing usually relies on hash chains or digital signatures; a hash chain links each log entry's hash value to the previous one, so any tampering breaks all subsequent hashes.
50%UnverifiedIn the compliance sense, audit trails need to satisfy hard requirements such as immutability (usually implemented through append-only storage or hash chains), complete context (recording who triggered which operation at what time, in what identity, and based on what input), and traceability (the ability to restore the data state before and after an operation).
50%UnverifiedHash chains provide tamper detection rather than tamper prevention, and typically still need to be combined with append-only storage or external witness mechanisms.
50%UnverifiedK-Dense BYOK records the process by observing what the agent actually does, with logs written to a location that the agent has no tool access to write to, forming a tamper-proof hash-chained record.
50%UnverifiedA hash chain is formed by concatenating the hash of each message with the hash of the previous message and hashing again, creating a chain structure where modifying any intermediate message invalidates all subsequent hashes.
50%