Explore the intricacies of Canon's Original Decision Data in this 50-minute conference talk by Dmitry Sklyarov at TROOPERS11. Delve into the speaker's experience and research on metadata, ranges, and camera-specific information. Learn about JPEG file signatures, information signatures, hash versions, shutter counts, and various identification methods for Canon cameras. Gain insights into the verification process and hear Sklyarov's personal opinions on the topic. Conclude with a discussion on the report submitted to Canon and participate in a Q&A session to further understand the complexities of digital image forensics.