A significant number of people raised their hands.
The MIT students figured out how to clone and reverse engineer Charlie tickets, adding values up to $600 on them.
My Fair Classic is a standard for data storage and communication made by NXP. It uses a proprietary 48-bit encryption algorithm called Crypto1.
The speaker initially tried to clone the Charlie tickets by using some common algorithms for the checksum.
The speaker and Maddie found out that the money is stored in two yellow bytes on the card, and it is in half pennies. They also found two transaction registers: current and last values.
The process involves isolating variables, xoring the money values to get a data modifier, and xoring the checksums to get a checksum modifier. Then, the data and checksum are xored by the modifiers to change the data within the line.
A meeting was held where y talked to the execs about their work and how they did it. They also discussed how the execs could prevent them from doing it in the future.
In the video, y demonstrated adding money to the Charlie Card and changing its type to employee.
The audience applauded and thanked y for the demo.