Every action logged forever. Complete transparency. Full compliance.
Write Once, Read Many - ensuring data integrity and compliance
Events are written to the ledger exactly once and can never be modified or deleted
Each entry is hash-chained to previous entries, making tampering mathematically impossible
All events retained indefinitely for compliance, legal discovery, and user transparency
File hash, timestamp, encryption key ID, metadata
Recipient ID, documents shared, expiration, conditions
Revoked party, reason, timestamp, affected documents
Soft delete only, original hash preserved, deletion reason
Requester ID, documents requested, purpose, IP address
Viewer ID, view duration, download flag, IP location
Full download record, watermark ID, purpose statement
Suspicious activity, fraud attempts, system alerts
CREATE TABLE audit_ledger (
id BIGSERIAL PRIMARY KEY,
event_hash VARCHAR(64) NOT NULL,
previous_hash VARCHAR(64) NOT NULL,
event_type VARCHAR(50) NOT NULL,
actor_id UUID NOT NULL,
resource_id UUID,
event_data JSONB NOT NULL,
timestamp TIMESTAMPTZ NOT NULL,
signature VARCHAR(128) NOT NULL,
-- Immutability constraints
CONSTRAINT no_updates
CHECK (false) NO INHERIT,
CONSTRAINT no_deletes
CHECK (false) NO INHERIT
);PostgreSQL with row-level security and immutability constraints
function createAuditEntry(event) {
const previousEntry = getLastEntry();
const entry = {
...event,
previousHash: previousEntry.hash,
timestamp: Date.now(),
nonce: crypto.randomBytes(32)
};
// Create tamper-proof hash chain
entry.hash = sha256(
JSON.stringify(entry)
);
// Sign with system key
entry.signature = sign(entry.hash);
return appendToLedger(entry);
}Each entry cryptographically linked to form unbreakable chain
Export audit logs for legal proceedings with chain-of-custody proof
Meet SOC2, GDPR Article 30, CCPA audit requirements
Configurable retention with legal hold capabilities
Mathematical proof of data integrity via hash chains
ML-powered anomaly detection on access patterns
Every entry signed with Ed25519 for non-repudiation
Every action on your documents is permanently recorded and auditable