More free lessons at: www.khanacademy.org/video?v=9-9_v1wSPBQ The basic mechanics of a bitcoin transaction between two parties and what is included within a given bitcoin transaction record. Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.