CTF Archive

Answer: F1nd1ng_4_w0rd_1n_y0ur_NPM_p4ck4g3

Explaination: Substitute the glyphs using the key,
then convert from hex to reveal the answer!

Answer: Wenge

Explaination: 64 + 54 + 52
#645452 is the hex code for 'Wenge'

Answer: "IF YOU CAN READ THIS THANK A COMPUTER SCIENTIST"

Explaination: echo "IF YOU CAN READ THIS THANK A COMPUTER SCIENTIST"
| od -x | tr -d ' \n' | rev | rot13 | fold -w 25

To turn the puzzle into text you need to

1. Remove the line breaks so the puzzle is one long string.
2. Apply ROT13 (Caesar cipher shift by 13)
   • This makes the letters only use a–f, which are valid hex digits.
3. Reverse the whole string.
4. Read it as hex:
   • Take the string two characters at a time (like 49, 46, 20, …).
   • Convert each pair from hex into its ASCII character.
   • Example: 49 = I, 46 = F, 20 = space.
5. Put it all together and the hidden message appears!

Answer: Firebrick

Explaination: B2 + 22 + 22
#B22222 is the hex code for 'Firebrick'

Answer: Bubbles

Explaination: E7 + FE + FF
#E7FEFF is the hex code for 'Bubbles'

Answer: Baby Blue Eyes

Explaination: A1 + CA + F1
#A1CAF1 is the hex code for 'Baby Blue Eyes'

Answer: https://www.apple.com/customer-letter/

Explaination: Published on the 47 day of 2016, that post references the
All Writs Act of 1789,
and the 11116274 is the id of the post in the url at
https://news.ycombinator.com/item?id=11116274