Kappa

“Great things are not done by impulse, but by a series of small things brought together.”

Pico CTF

---

Binhexa

Description

How well can you perfom basic binary operations? Start searching for the flag here.

• nc titan.picoctf.net 61002

Hints

1. None

Solution

picoCTF{b1tw^3se_0p3eR@tI0n_su33essFuL_6862762d}

CLI

kappa@kappa-Aspire-Z5600:~$ nc titan.picoctf.net 61002

          Welcome to the Binary Challenge!"
          Your task is to perform the unique operations in the given order and find the final result in hexadecimal that yields the flag.

          Binary Number 1: 00001010
          Binary Number 2: 11010110


          Question 1/6:
          Operation 1: '>>'
          Perform a right shift of Binary Number 2 by 1 bits .
          Enter the binary result: 1101011
          Correct!

          Question 2/6:
          Operation 2: '&'
          Perform the operation on Binary Number 1&2.
          Enter the binary result: 0
          Incorrect. Try again
          Enter the binary result: 00000010
          Correct!

          Question 3/6:
          Operation 3: '<<'
          Perform a left shift of Binary Number 1 by 1 bits.
          Enter the binary result: 10100
          Correct!

          Question 4/6:
          Operation 4: '*'
          Perform the operation on Binary Number 1&2.
          Enter the binary result: 100001011100
          Correct!

          Question 5/6:
          Operation 5: '+'
          Perform the operation on Binary Number 1&2.
          Enter the binary result: 11100000
          Correct!

          Question 6/6:
          Operation 6: '|'
          Perform the operation on Binary Number 1&2.
          Enter the binary result: 11011110
          Correct!

          Enter the results of the last operation in hexadecimal: DE

          Correct answer!
          The flag is: picoCTF{b1tw^3se_0p3eR@tI0n_su33essFuL_6862762d}
        

Here are some converters

• https://miniwebtool.com/bitwise-calculator/bit-shift
• https://www.rapidtables.com/calc/math/binary-calculator.html
• https://www.rapidtables.com/convert/number/binary-to-hex.html

List of functions

• << (Logical left shift)
• >> (Logical right shift)
• | (OR)
• & (AND)
• * (Multiplication)
• + (Addition)