Illustration of a Polybius square, an encryption and telegraphy device described by the Ancient Greek scholar, Polybius. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Science Source / Spencer Sutton |
Taille de l’image : | 3602 px × 3548 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |