File:Kenngruppenbuch.jpg

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Summary[edit]

Media data and Non-free use rationale
Description	This image is a picture of a historical German document in the form of a booklet which was used by a telegraphist of the Kriegsmarine during World War II, to enable the correct use of the Naval Enigma message enciphering procedure.
Author or copyright owner	Micheal Hörenberg, Uferstr. 29, D-78343 Hemmenhofen
Source (WP:NFCC#4)	https://enigma.hoerenberg.com/
Date of publication	22 October 2016
Use in article (WP:NFCC#7)	Discriminant Book
Purpose of use in article (WP:NFCC#8)	For visual identification of the object of the article. The article as a whole is dedicated specifically to a discussion of this work.
Not replaceable with free media because (WP:NFCC#1)	Can't be replaced as the booklet, i.e photograph is intrinsically tied to the Naval Enigma during World War II, as part of the enciphering process.
Minimal use (WP:NFCC#3)	This is a unique historical document, of sufficient size to make the Gothic font readable to the average Wikipedia user. It is a military document from the Second World War and will be used in a single article, described above. The image will be thumb-nailed during normal use. The colour is important as it is used by U-boat staff to indicate that it is a disposable document, e.g. after attack.
Respect for commercial opportunities (WP:NFCC#2)	I have been unable to locate any uses of this image, outside cryptography sites, and as such I believe commercial opportunities are limited.
Other information	This is a critical image with a unique historical perspective. No other image can replace it, as it represents the process of enciphering a message using the Naval Enigma.
Fair useFair use of copyrighted material in the context of Discriminant Book//en.wikipedia.org/wiki/File:Kenngruppenbuch.jpgtrue

Licensing[edit]

This image is of book cover(s), and the copyright for it is most likely owned either by the artist who created the cover(s) or the publisher of the book(s). It is believed that the use of low-resolution images of book covers

to illustrate an article discussing the book in question
on the English-language Wikipedia, hosted on servers in the United States by the non-profit Wikimedia Foundation,

qualifies as fair use under the copyright law of the United States. Any other uses of this image, on Wikipedia or elsewhere, might be copyright infringement. See Wikipedia:Non-free content for more information.
Fair use

To the uploader:

Please add a detailed non-free use rationale for each article the image is used in, which must also declare compliance with the other parts of the non-free content criteria, as well as the source of the work and copyright information.
For example non-free use rationales, see Wikipedia:Use rationale examples.
This tag should only be used for book covers.
Please include in your fair use rationale details of the particular edition (publisher, market & year of publication) of the edition you have used, and also acknowledge any cover artist if such artist is acknowledged in that edition's frontmatter. If the book cover is in the public domain (see Wikipedia:Public domain), then use the appropriate public domain tag rather than this one.
Any of the following may be helpful for stating the rationale: Template:Book rationale, Template:Non-free use rationale book cover, or Template:Manga rationale.

To patrollers and administrators: If this image has an appropriate rationale please append |image has rationale=yes as a parameter to the license template.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	20:10, 15 February 2017		271 × 368 (12 KB)	DatBot (talk \| contribs)	Reduce size of non-free image (BOT - disable)
	22:19, 22 October 2016	No thumbnail	587 × 799 (31 KB)	Scope creep (talk \| contribs)	Uploading a non-free work, as object of commentary using File Upload Wizard

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File usage

The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Discriminant Book