Use our API to preserve privacy with shared, sensitive information

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Proprietary approach to shared cryptography.

PAD is powered by a patented cryptographic protocol. With this protocol, it’s possible for a sharer (Alice) to have certainty that a secret has not been decrypted by the recipient (Bob) until he chooses to decrypt it.


Central to the transparency of decryption in PAD is the ledger. By observing this ledger, Alice can determine whether a secret has been decrypted, and when relevant, by whom.


Are the partially trusted keepers of the means of accessing Alice’s secret. The means of decryption are spread across multiple trustees, so that no one entity can control access. They observe the ledger for access requests and share the means of access.


When Bob needs to access the secret, he posts his request to the Accountability ledger. The trustees respond automatically with their secret shares - Alice does not need to participate in an additional transaction.

Encryption Decryption



Alice encrypts her secret, and splits up the decryption key


She sends the decryption key shares to the Trustees


Similar to trustees, validators ensure that only legitimate persons can access a secret. They also observe the ledger and respond to legitimate requests.



If or when Bob needs access to the information, he submits a decryption request to the ledger


Trustees see the request and publish their secret shares


Once a threshold number of trustees have published their shares, Bob can reconstruct the data

Product Roadmap

You can sign up to the service today. This is implemented on a permissioned blockchain (Hyperledger Fabric) and available on Oracle Cloud. The service can be accessed via API.

(See Docs for API specs and code samples).

Anyone can become a trustee, and help to protect the privacy of people around the world. The easiest way to become a trustee is using a Raspberry Pi. The Pi image and instructions to start are also available in Docs

Over the next few weeks we will extend the API further, and then open up direct access to the Blockchain for relevant ledger transactions.

We are also assessing public blockchain deployment options. We expect to make further announcements on public blockchain implementations soon.