Blockchain Project Embarking on Quantum Entanglement Security. Blockchain, that digital technology proclaimed to be unhackable, is susceptible to quantum computer hacking. Blockchain company, Qset, is positioning itself to secure blockchain via quantum entanglement. Entangled photons (quantum bits, or qubits) are being researched for application to foundational technologies in blockchain – the digital ledger which records transactions, securely, at present. If successful, Qset and the blockchain technology stands to gain greatly.