Start with the tweet
wget https://twitter.com/1231507051321/status/684596461628223488
Get the image
wget https://infotomb.com/4gq25.jpg
Run outguess
outguess -r 4gq25.jpg 4gq25.jpg.outguess
Verify signature
gpg < 4gq25.jpg.outguess
Output:
Hello.
The path lies empty; epiphany seeks the devoted.
Liber Primus is the way. Its words are the map, their
meaning is the road, and their numbers are the direction.
Seek and you will be found.
Good luck.
3301
Beware false paths. Verify OpenPGP 7A35090F.
gpg: Signature made Fri 01 Jan 2016 12:01:07 AM UTC
gpg: using RSA key 0x181F01E57A35090F
gpg: Good signature from "Cicada 3301 (845145127)" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: 6D85 4CD7 9333 22A6 01C3 286D 181F 01E5 7A35 090F
- The message is signed.
- The image contains the "Cicada Logo" and the "Oak Tree In Winter".