Nullkey
A shadow in the code that knows your name.
AI-powered, quantum-resistant recryption—built to grant access, bound to vanish without a trace. Nullkey forges trustless channels in hostile networks, shifting control of your data back to you.
▼ Descend to access deeper protocols
Shadow API
Forge-your-own encrypted shadow.
Harness Nullkey's AI-powered recryption engine to create secure, private data channels over forbidden protocols—bypassing trusted intermediaries entirely. Define your own encryption topology, delegate access on your terms, and revoke it instantly. The Shadow API is your gateway to building autonomous, censorship-resistant, and quantum-hardened data flows in the digital underworld.
Access is restricted. Cipher request required.
Use Cases
Proxy Re-Encryption applications for secure data sharing
Secure Cloud Data Sharing & Access Control
Enable fine-grained file sharing in the cloud without revealing plaintext to the provider.
Example: Alice encrypts her files with her own public key before uploading them. To share with Bob, she generates a re-encryption key (rkA→B) for the cloud proxy. The proxy transforms Alice's ciphertext into one Bob can decrypt—without ever seeing the plaintext or private keys.
Encrypted Email Forwarding
Forward encrypted email securely without handing over private keys.
Example: Alice configures her email server with rkA→B. When encrypted mail for Alice arrives, the server transforms it into a ciphertext Bob can read using his own key—no need for Alice to share her private key.
Secure Distributed Storage & File Systems
Manage access to encrypted files stored on untrusted servers.
Example: An access control server—centralized or decentralized—acts as the proxy, re-encrypting file keys for authorized users without learning the keys themselves.
Digital Rights Management (DRM)
Distribute digital content securely to authorized devices.
Example: A license server holds content keys encrypted under the publisher's key. Upon purchase, the server uses PRE to re-encrypt the content key for the user's specific device or application.
Healthcare Data Sharing
Share sensitive medical data securely with trusted parties.
Example: A patient's records, encrypted under their key, are stored by a hospital (proxy). The patient can grant temporary access to doctors or specialists by issuing re-encryption keys—no need to share their main decryption key.
Secure Publish–Subscribe Systems
Deliver encrypted messages in pub/sub networks without revealing publisher or subscriber keys.
Example: A broker acts as the proxy, re-encrypting published messages for authorized subscribers.
Key Escrow & Controlled Access
Enable legally mandated access without storing user keys centrally.
Example: Under strict conditions, a re-encryption key can grant decryption to an authorized third party—though this remains a controversial use case.
Blockchain & Decentralized Applications
Bring confidentiality to public ledgers.
Example: Encrypted data is stored off-chain, with only hashes or pointers on-chain. Access is granted via re-encryption keys, potentially managed by smart contracts or decentralized proxy networks.
Secure Computation (HPRE)
Enable collaborative computation on encrypted data across domains.
Example: Homomorphic PRE allows different parties' encrypted data to be re-encrypted into a shared domain for computation—without any participant or server seeing plaintext.
Secure Network Function Virtualization (NFV) & 5G
Protect data as it moves across network boundaries.
Example: A network element acts as a proxy, re-encrypting payloads for the next function in the chain—ensuring confidentiality without intermediate decryption.
Secure Payment Systems
Protect transaction data and delegate payment authorization securely.
Example: PRE can be used to encrypt payment data and allow controlled access to transaction details or authorization processes without exposing sensitive keys.
Vault/
Every lock has a shadow. We don't open doors. We remove them.
Cipher Keys
Access Routes
Shadow Map
FAQ
"If it exists, it can be erased"