At ASTON, we provide a decentralized platform for the authentication of documents. Our technology is developed using the existing blockchain platform, with enhancements that result in a cutting-edge security solution. The X-chain technology developed by ASTON resolves the various problems present in existing blockchain systems. We replace the traditional linear blockchain storage method with a multi-dimensional blockchain structure, which makes digital document authentication significantly more scalable. Moreover, the security authentication solution (Smart-Pass On) based on the public key infrastructure (PKI) and the biometric signature authentication (FIDO) ensures an even higher level of document security for users.