Illustration of a Polybius square, an encryption and telegraphy device described by the Ancient Greek scholar, Polybius. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Source / Spencer Sutton |
Bildgröße: | 3602 px × 3548 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |