Explore the fundamentals of IOTA, a unique feeless cryptocurrency, in this 34-minute lecture by Serguei Popov from the University of Campinas. Delve into the IOTA Foundation's vision, the concept of tangled ledgers, and consensus rules that set IOTA apart from traditional blockchain technologies. Examine the original motivation behind IOTA's creation and its advanced properties, including the main rule and Monte Carlo tip selection. Discover the advantages and challenges of this innovative cryptocurrency, touching on topics such as quantum cryptography, finality devices, and decentralized systems. Gain valuable insights into this cutting-edge technology that aims to revolutionize the cryptocurrency landscape.