Key reclamation in blockchain network via OPRF

A method comprising:

• encrypting, via a client application, a private key with an encryption key;
• generating a plurality of keys based on the encryption key;
• converting the plurality of keys into a plurality of key shares based on a secret input value that is received from and known only to a user of the client application;
• storing the encrypted private key in a blockchain comprising a plurality of peers via a blockchain transaction;
• transmitting a different key share of the plurality of key shares to each blockchain peer of the plurality of peers;
• wherein a minimum number of corresponding different key shares is received from the plurality of peers;
• wherein the secret input value from the user is received;
• and
• wherein the encryption key is recovered based on an execution of an oblivious pseudorandom function (OPRF).

A non-transitory computer-readable medium comprising instructions that, when executed by a processor, cause the processor to perform:

• encrypting, via a client application, a private key with an encryption key;
• generating a plurality of keys based on the encryption key;
• converting the plurality of keys into a plurality of key shares based on a secret input value that is received from and known only to a user of the client application;
• storing the encrypted private key in a blockchain comprising a plurality of peers via a blockchain transaction
• transmitting a different key share of the plurality of key shares to each blockchain peer of the plurality of peers;
• wherein a minimum number of corresponding different key shares is received from the plurality of peers;
• wherein the secret input value from the user is received;
• and
• wherein the encryption key is recovered based on an execution of an oblivious pseudorandom function (OPRF).