Biometric authentication sensor with an encryption module for prevention of h/w hacking in digital custody services

In this paper, a digital personal safe system was proposed with Fast ID Online (FIDO) transaction authentication and multiple decentralized ID (DID) personal authentications based on a home gateway. This individual custody model of personal multiple authentications will be linked to the transaction authentication of digital assets stored in the storage space of the home gateway by the DID of smart devices and the FIDO server for a public platform that excludes digital asset (cryptocurrency [e.g., Bitcoin] or NFT asset) management based on individual private keys and user interaction (user interface and user experience [UI/UX]) at home. To strengthen the security of the proposed digital custody model, it was proposed to apply a local device to which a biometric sensor equipped with an encryption module that can fundamentally block the hacking of biometric information is applied. It is implemented with Verilog for an embedded fingerprint sensor block and decryption program implemented with C.