[Day 19] Hardware Hacking

December 19, 2022

Today I got to work with low-level hardware hacking. I have not done much hardware hacking other than a Booz-Allen competition I did during my senior year of undergraduate. I quickly realized this type of hacking can take just as much learning effort as penetration testing requirements. In any case, I learned some neat protocols for low-level communications and how two different baud rates can be read at different frequencies. Maybe this is something I can educate myself more on in the future!

Flags

What device can be used to probe the signals being sent on electrical wires between two devices?

logic analyser

USART is faster than SPI for communication? (Yea,Nay)

Nay

USART communication uses fewer wires than SPI? (Yea,Nay)

Yea

USART is faster than I2C for communication? (Yea,Nay)

Nay

I2C uses more wires than SPI for communication? (Yea,Nay)

Nay

SPI is faster than I2C for communication? (Yea,Nay)

Yea

What is the maximum number of devices that can be connected on a single pair of I2C lines?

1008

What is the new baud rate that is negotiated between the microprocessor and ESP32 chip?

9600

What is the flag that is transmitted once the new baud rate was accepted?

THM{Hacking.Hardware.Is.Fun}