Pu Liu

Title: The Innovations of Pu Liu

Introduction

Pu Liu is an accomplished inventor based in Carnation, WA (US). He has made significant contributions to technology, particularly in the field of secure identity management and public key infrastructure (PKI). With a total of 3 patents, Liu's work has garnered attention for its innovative approaches to enhancing security in digital communications.

Latest Patents

One of Liu's latest patents is titled "Dynamic attachment of secure properties to machine identity with digital certificates." This technology focuses on dynamically attaching secure properties to an identity certificate. The claims determining secure properties for an identity are signed and embedded in the identity certificate. Both the identity certificate and the signed claims within it are verified. When a service request is received from the identity, the signed claims from the identity certificate are checked to determine if the request is permitted. If the request is permitted, the service request is processed. This patent includes examples of creating claims that determine the secure properties for a remote machine, signing these claims, distributing them to a certificate authority, embedding them in the remote machine identity certificate, and distributing the certificate. The claims can be embedded in the certificate as X.509 properties.

Another notable patent is "Establishing PKI chain of trust in air gapped cloud." This technology establishes a chain of trust for an unknown root certificate in an isolated network, verified using a chain of trust external to the network. A bootstrap executable and a leaf certificate rooted in the external chain of trust are configured with an OID. The leaf certificate is received in the isolated network and used to sign a new root certificate created within the network, resulting in a blob stored in a predetermined location. The bootstrap executable is executed to instantiate a client machine, which retrieves the blob and verifies its signature using the leaf certificate. The client machine checks that the OID values from the blob and bootstrap executable match. If the signature and OID checks are successful, the new root certificate is distributed within the isolated network and installed in a PKI certificate chain of trust.

Career Highlights

Pu Liu is currently employed at Microsoft Technology Licensing, LLC, where he continues to innovate and develop technologies that enhance security in digital environments. His work at Microsoft has allowed him to collaborate with leading experts in the field and contribute to groundbreaking advancements in technology.

Collaborations

Liu has worked alongside talented colleagues, including Yingchang