Random Coding for Long-Range Continuous-Variable QKD

Quantum Key Distribution QKD schemes are key exchange protocols based on the physical properties of quantum channels. They avoid the computational-hardness assumptions that underlie the security of classical key exchange. Continuous-Variable QKD CVQKD, in contrast to qubit-based discrete-variable...

BCH public chain OP_CHECKDATASIG suffers from a logic flaw vulnerability

The attack payload is a precisely constructed P2SH Transaction that utilizes the OPCHECKDATASIG opcode introduced by the BCH upgrade last November. The attack payload has a SigOP count of 1334 15 = 20010, and this attack payload TX is rejected by the node with an error of too many sigops, which i...