This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
PURPLE. en Fragment of Purple machine on display at the United States National Security Agency's National Cryptologic Museum located in Ft Meade Maryland The plaque at the base of the machine fragment reads 'Purple' This is the largest of three surviving pieces of the famous Japanese diplomatic cipher machine It was recovered from