Systems and methods for addressing security-related vulnerabilities arising in relation to off-blockchain channels in the event of failures in a network

A method comprising:

• providing to a hub, from an enclave associated with a trusted execution environment at a node, an enclave public key;
• establishing a channel with the hub by broadcasting to a blockchain network a funding transaction which encumbers a digital asset with a first public key, a second public key and a third public key, wherein the encumbrance of the digital asset is removeable in one of two ways, wherein the first way of the two ways requires a first signature generated from a first private key corresponding to the first public key and a second signature generated from a second private key corresponding to the second public key and the second way of the two ways requires a third signature valid for the third public key wherein the third public key is associated with a group;
• receiving, at the enclave, a commitment transaction from the hub, the commitment transaction encrypted with the enclave public key;
• detecting a failure of the hub;
• and
• issuing a failsafe activation request to the group using data from the enclave, the data based on the commitment transaction, wherein the failsafe activation request is generated within the enclave and signed using an enclave private key associated with the enclave public key.