Walter David Pullen

Title: Walter David Pullen: Inventor in Software Security

Introduction

Walter David Pullen is an inventor based in Seattle, Washington. His patent work includes techniques for protecting text streams with watermarks and preventing potentially unsafe files from opening. He is associated with Microsoft Technology Licensing, LLC, and holds 5 patents.

Latest Patents

Pullen’s recent patent work includes “Tamper-resistant text stream watermarking,” which describes embedding a watermark in text without changing its substance. The system can use recurring patterns in whitespace, contractions, abbreviations, or programming-code conventions to encode a fingerprint. By examining those patterns in a suspect text stream, the system can help identify the document’s assigned source or version.

His “File blocking mitigation” patent describes examining a file’s data to determine its true format before opening it. If that format is designated as blocked, the system prevents the file from loading into memory or being accessed and displays a message to the user.

Career Highlights

Pullen’s listed inventions address practical software security challenges: tracing the source or version of text and controlling access to files based on their actual formats. His work is associated with Microsoft Technology Licensing, LLC.

Collaborations

Pullen’s listed coworkers include Bradley D. Miller and Maithili Dandige.

Conclusion

Walter David Pullen’s patent portfolio reflects a focus on software security, with inventions designed to support text provenance and mitigate risks from blocked file formats.