The BSidesDC 2018 Kids crypto challenge puzzle

1. 2018 BSidesDC
Kids Crypto Challenge

2. • For this year’s challenge the kids had to go find several photographs
around the con area, decrypt the messages and when done tell me
about each of the people in the photographs.

3. First Clue: Et tu Brute
iwtitgbstqjvvxcvxhpiigxqjitsiwxhetghdc

4. https://youtu.be/9eyFDBPk4Yw

9. Solutions
• Caesarian shift 15
The term debugging is attributed this person (Grace Hopper)
• Keyed caesarian, key= nanosecond Shift 12
Find this hidden figure (Katherine Johnson)
• Keyed Vigenere, Alpha key=lindbergh, Passphrase=Hampton
She invented technology used by torpedoes and wifi* (Hedy Lamar)
• Playfair, key=piano
ios developer model actress (Lyndsey Scott)
• Bifid, key=scratch
Her software went to the moon (Margaret Hamilton)
*Hedy Lamar’s patent was never used for torpedoes as they don’t use RF,
however it is used as part of FHSS.