Editing Lorenz cipher (section)

==Further reading==
* {{Citation | last = Budiansky | first = Stephen | author-link = Stephen Budiansky | date = 2000 | title = Battle of wits: The Complete Story of Codebreaking in World War II | publisher = Free Press | isbn = 978-0684859323 | url-access = registration | url = https://archive.org/details/battleofwitscomp00budi }} Contains a short but informative section (pages 312–315) describing the operation of Tunny, and how it was attacked.
* {{Citation | last = Flowers | first = T. H. | author-link = Tommy Flowers | title = The Design of Colossus | journal = Annals of the History of Computing | volume = 5 | issue = 3 | pages = 239–252 | year = 1983 | url = http://www.ivorcatt.com/47c.htm | doi=10.1109/mahc.1983.10079| s2cid = 39816473 | url-access = subscription }}* Paul Gannon, ''Colossus: Bletchley Park's Greatest Secret'' (Atlantic Books, 2006). Using recently declassified material and dealing exclusively with the efforts to break into Tunny. Clears up many previous misconceptions about Fish traffic, the Lorenz cipher machine and Colossus.
* {{Citation | last = Small | first = Albert W. | title = The Special Fish Report | year = 1944 | url = http://www.codesandciphers.org.uk/documents/small/smallix.HTM | access-date = 21 September 2010 }}
* {{Citation | last = Smith | first = Michael | author-link = Michael Smith (newspaper reporter) | title = Station X: The Codebreakers of Bletchley Park | edition = Pan Books | series = Pan Grand Strategy Series | year = 2007 | orig-year = 1998 | publisher = Pan MacMillan Ltd | location = London | isbn = 978-0-330-41929-1 }} Contains a lengthy section (pages 148–164) about Tunny and the British attack on it.