US Patent 11303437 Proof-of-work key wrapping with key thresholding

The technology disclosed herein provides a proof-of-work key wrapping system that uses key thresholding to cryptographically control data access. An example method may include: accessing a plurality of cryptographic key shares, wherein two or more of the plurality of cryptographic key shares enable access to content; selecting, by a processing device, a set of cryptographic attributes in view of a characteristic of a computing device; encrypting the plurality of cryptographic key shares to produce a plurality of wrapped key shares, wherein at least one of the plurality of cryptographic key shares is encrypted in view of the set of cryptographic attributes; and providing a wrapped key share of the plurality of wrapped key shares and at least one of the cryptographic attributes to the computing device, wherein the at least one cryptographic attribute facilitates deriving an access key from the plurality of wrapped key shares.