An example operation may include one or more of identifying a blockchain transaction requiring peer endorsement, transmitting a request for endorsement to one or more peers assigned to a blockchain, receiving endorsement response messages from the one or more peers, wherein the endorsement response messages comprise a plurality of priorities assigned to the blockchain transaction, and forwarding the received plurality of priorities and the blockchain transaction to an ordering node for assignment to the peers.

There is provided a computer-implemented method, a computer system and a cryptocurrency depository for enabling secure escrow and safekeeping of a cryptocurrency. The computer implemented method starts by establishing a secure communication between a first party device associated with a depositor of the cryptocurrency and a second party device associated with a secure cryptocurrency depository, in a cryptocurrency network. The secure cryptocurrency depository is a secure cryptocurrency escrow and/or a secure cryptocurrency vault. Further, the first party device and/or the second party device is enabled to transfer the available funds/tokens away from the multi-signature address using the second partially signed provisional transaction template and/or the first partially signed provisional transaction template in possession of the first party device and second party device respectively, in case the first party and/or second party private-keys/secrets and/or the hardware tokens are lost/stolen, thereby preventing theft.

A computer-controlled diagnostic network system. The system includes diagnostic devices and diagnostician devices located at different locations in a distributed secured network. The system includes a computer-controlled central blockchain server for storing and processing details obtained from the diagnostic devices and the diagnostician devices. The computer-controlled central blockchain server is communicatively coupled to a data extraction device for retrieving a plurality of computer-executable files stored at discrete distributed locations associated with one or more users of the distributed secured network. The computer-controlled central blockchain server is communicatively coupled to a blockchain device to process blockchain tasks through blockchain-enabled and computer-controlled software and hardware tools. The computer-controlled central blockchain server is located at a location remote from the locations of the diagnostic devices and the diagnostician devices.

The present disclosure involves methods, apparatus, and systems for processing equality testing in secure multi-party computation (MPC). In one aspect, a method includes, generating, by a first party of the secure MPC, a difference between a secret share of a first value and a secret share of a second value. During a first iteration, the difference is partitioned into N sections each including M bits. For each section, a random bit is generated, a group of 2.sup.M bits are generated based on the random bit, and a selected bit from the group of 2.sup.M bits is sent to a second party of the secure MPC based on oblivious transfer (OT) protocol. The random bits of the N sections are concatenated as an input of a second iteration. The method further includes determining whether the first value equals the second value based on performing a plurality of iterations.