Size of this PNG preview of this TIF file: 677 × 600 pixels. Other resolutions: 271 × 240 pixels | 542 × 480 pixels | 910 × 806 pixels.
Original file (910 × 806 pixels, file size: 733 KB, MIME type: image/tiff)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: A format of one-time pad used by the U.S. National Security Agency, code named DIANA. The table on the right is an aid for converting between plaintext and ciphertext using the characters at left as the key. The black circle is an artifact of copying, due to a hole punched in the original. |
| Date | |
| Source | https://www.governmentattic.org/18docs/Hist_US_COMSEC_Boak_NSA_1973u.pdf A History of U.S. Communications Security; the David G. Boak Lectures, National Security Agency (NSA), Volumes I, 1973, Volumes II 1981, partially released 2008, additional portions declassified October 14, 2015 |
| Author | US National Security Agency |
Licensing
|
This article or image contains materials that originally came from a National Security Agency (NSA) website or publication. It is believed that this information is not classified, and is in the public domain in the United States. See the privacy and security information.
|
 |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:08, 12 July 2018 |  | 910 × 806 (733 KB) | TemTem | Reduced filesize |
| 16:02, 21 December 2015 |  | 910 × 806 (904 KB) | ArnoldReinhold | User created page with UploadWizard |
File usage
The following 15 pages use this file:
Global file usage
The following other wikis use this file:
- Usage on el.wikipedia.org
- Usage on ko.wikipedia.org