Polybius tablets and squares were originally used in Ancient Greece to transmit messages via torches. It is a system used for encryption and telegraphy. IT works by replacing each letter of ht alphabet with a two digit number.
RMID:Image ID:2HJCPC3
Image details
Contributor:
Science History Images / Alamy Stock PhotoImage ID:
2HJCPC3File size:
40.9 MB (441.7 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
5100 x 2804 px | 43.2 x 23.7 cm | 17 x 9.3 inches | 300dpiDate taken:
7 October 2021Photographer:
Science History ImagesMore information:
This image could have imperfections as it’s either historical or reportage.