Classified and sensitive documents are frequently distributed under a 'broadcast-encrypt, individually-decrypt' architecture where a single file is shared with multiple authorized recipients. When a leak occurs, every recipient who possessed decryption capability is an equally plausible suspect because the decrypted content is identical across all nodes and bears no trace of the specific decryption event. Traditional access logs can be altered by rogue administrators, and static pre-distribution watermarks fail to uniquely trace individual decryption sessions.
Build a secure document distribution and decryption system that dynamically binds every decryption event to the recipient's identity using private-key digital signatures, injects an invisible recipient-specific forensic watermark at the exact moment of decryption, and commits immutable decryption records to an air-gap-capable audit ledger.
Injecting robust, imperceptible forensic watermarks dynamically during memory decryption without degrading rendering performance, ensuring watermarks survive screenshotting, cropping, filtering, and printing, and maintaining cryptographic non-repudiation in offline or air-gapped environments.
A high-assurance secure document viewer and distribution pipeline incorporating dynamic frequency-domain invisible watermarking (DCT/DWT), recipient private-key decryption attestation, Post-Quantum Cryptographic key exchange, and a decentralized or append-only tamper-evident Merkle ledger.