Sepior’s Threshold KMS Blockchain Privacy Control introduces a powerful new tool to efficiently manage confidentiality and privacy of permissioned blockchain data and applications accessed by authorized participants. Using the latest threshold cryptographic techniques, including multiparty computation (MPC) Sepior™ Threshold KMS delivers advanced ledger security and privacy control, with industry leading granularity and interoperability, while maximizing blockchain performance and scale.
Sepior Threshold KMS provides fine-grained privacy control in a simple to implement and highly interoperable off-chain manner. Implementation off-chain allows a common security and privacy control solution across different blockchain technologies to maximize interoperability with other systems and future blockchain technologies. Simple and consistent, off-chain approaches such as Threshold KMS yield better security as well as interoperability.
The control to content access may be defined per user on a per document or smart contract level, or to the level of specific fields or objects within the application. The result is an agile privacy control solution with industry leading key availability, and minimum complexity and cost.
Sepior™ Threshold KMS works with virtually any blockchain technology, using the latest threshold cryptography techniques. Key management policies are fully defined and implemented off-chain, for administrative and operational simplicity.
Sepior’s patented threshold cryptographic approach, using MPC, allows n number of Threshold KMS services to run on separate virtual machines that may be hosted across multiple data centers or clouds to provide maximum system resiliency. These systems use MPC to confirm that at least m (a definable threshold) of these Threshold KMS services are available for MPC to produce keys used by each authorized blockchain participant to access content, without ever having a whole key exist on any virtual key management server.
The result is that Sepior’s Threshold KMS approach:
Maximizes fine-grained privacy control for distributed trust across multiple organizations
Eliminates the need for hardware security modules (HSMs)
Supports unlimited scale and high availability using the cloud
Maximizes interoperability with an off-chain implementation
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Sepior™ Threshold KMS is available to blockchain application developers and blockchain as a service infrastructure providers through technology licensing agreements. Sepior will provide the enabling software, toolkits, and licenses for you to customize your implementation of Threshold KMS security services.
Sepior™ Threshold KMS consists of:
n instances of Threshold KMS Services running in VMs
Management portal, an application specific web portal
SDKs for the relevant languages, including smart contract languages
Plugins or connectors when required (i.e., Hyperledger Fabric)
Optional secure transaction signing