Abstract: Quantum security may be enhanced through the use of quantum-safe validators for transactions whereby the quantum-safe validators process quantum-safe addresses and signatures of parties to the transactions. Quantum safety may be added to conventional blockchain transactions, for example, via smart contracts which are executed using cryptographic interlocks to between conventional smart contract execution engines and quantum-safe validators to ensure both quantum-safe processing of addresses and signatures and legitimacy of quantum-safe validators in presenting transactions for incorporation on the chain.

Abstract: A system is provided for accessing and/or controlling at least one first computer connected to a local computer network (target computer) from at least one remote computer (being remote from the local computer network), that includes: a server computer operable to act as an intermediary between the target computer and the remote computer; and at least one proxy computer linked to the server computer and the target computer that is send digital signal(s) to the target computer as a proxy computer. The server computer is responsive to a remote computer request and then sends a communication directing the proxy computer to send the digital signal(s) to the target computer. The target computer receives the digital signal(s) from the proxy computer and thereby achieves a state in which the target computer is operable to act on the digital signal.

Abstract: A system is provided for accessing and/or controlling at least one first computer connected to a local computer network (target computer) from at least one remote computer (being remote from the local computer network). The system includes a server computer that is operable to act as an intermediary between the target computer and the remote computer; and at least one proxy computer on the local computer network, linked to the server computer and the target computer, the proxy computer being is operable to act as a proxy for the server computer to send digital signal(s) to the target computer. The server computer is responsive to a request from the remote computer that at least one digital signal be sent from the server computer to the target computer; and is operable in response to the request to send a communication to the proxy computer directing the proxy computer to send the at least one digital signal to the target computer.