Abstract: There is provided a requestor device for digital signing of a message, comprising: at least one hardware processor executing a code for: transmitting the message for signing thereof, in a single request session over the network to each one of a plurality of validator devices, wherein a beacon device computes and transmits over a network to each one of a plurality of validator devices a signature-data value computed and signed by the beacon device, receiving in a single response session from each one of the plurality of validator devices, a respective partial-open decrypted value computed for the signature-data value and the message, and aggregating the partial-opens decrypted values received from the plurality of validator devices to compute the digital signature of the message.

Abstract: Methods, system and devices for sharing a secret between an isolated device connected to a network through a transmit-only unidirectional secure channel and a network connected user device, comprising generating a secret value divided to first and second components, transmitting the first component, via the unidirectional secure channel, to one or more computing nodes of a distributed system, and transferring the second component, via a tamper-resistant unidirectional insecure channel, to the network connected user device associated with the user to enable the network connected user device to reproduce the secret value by combining the first component received from one or more of the computing nodes with the second component.

Abstract: A method of increasing security of digital assets stored in an isolated device by associating the isolated device with a plurality of accounts of the user each configured to store a limited value of digital assets, each of the plurality of accounts is assigned an asymmetric cryptographic key pair (comprising a unique private key encrypting the respective account and a corresponding public key identifying the respective account), transmitting, via a unidirectional secure channel, the public key assigned to each of the plurality of accounts to one or more computing nodes connected to a network community regulating the digital assets and transferring a value of the digital assets by transmitting, to one or more of the computing nodes, the private key of one or more of the plurality of accounts cumulatively storing the transferred value thus releasing the limited value stored in the respective account(s).