Daily key

This key table of the German Air Force contains (for a calendar month of the year 1944 or 1945) the 31 daily keys valid for each individual day of the month for the basic setting of the rotor cipher machine Enigma .

As day key ( English Daily key ) is in the cryptology and for a period of time, usually for a day , a constant and uniform to-use cryptographic keys called.

It is in contrast to the " saying key ", that is, the sub- key to be chosen individually.

In most cases, keys that are valid for slightly different periods of time than exactly one day, for example for eight hours or for two days, are also referred to as day keys . In rare cases, depending on the period of validity, more precise expressions such as

Month key ,
Decade key (for ten days),
Week key or
Hourly key .

In general, it can also be referred to as the time key or basic key.

literature

Friedrich L. Bauer : Deciphered Secrets. Methods and maxims of cryptology. 3rd, revised and expanded edition. Springer, Berlin a. a. 2000, ISBN 3-540-67931-6 .
Michael Miller: Symmetrical encryption methods. B. G. Teubner Stuttgart 2003, ISBN 978-3-519-02399-9 .

Web links

OKW : Key instructions for the Enigma key machine . H.Dv. G. 14, Reichsdruckerei , Berlin 1940. (Copy of the original manual with a few small typing errors.) Accessed December 17, 2018. PDF; 0.1 MB ( memento from September 24, 2015 in the Internet Archive )
Key material 1943 (PDF; 670 kB), accessed on December 17, 2018.

Individual evidence

↑ OKW: Key instructions for the Enigma key machine . H.Dv.g. 14, Reichsdruckerei, Berlin 1940, p. 5. (Copy of the original manual with a few small typing errors.) Retrieved on December 17, 2018. PDF; 0.1 MB ( memento from September 24, 2015 in the Internet Archive )
↑ Friedrich L. Bauer: Deciphered secrets. Methods and maxims of cryptology. 3rd, revised and expanded edition. Springer, Berlin a. a. 2000, p. 160.
^ Michael Miller: Symmetrical encryption methods. BG Teubner Stuttgart 2003, ISBN 978-3-519-02399-9 , p. 58.
↑ Cryptocellar.org key material 1943 (PDF; 670 kB), accessed on December 17, 2018.
↑ Systematic overview of the most important terms in cryptology from technical terms of the encryption system 1957 to 1971 of the MfS / ZCO , accessed on December 17, 2018.

[1] OKW: Key instructions for the Enigma key machine . H.Dv.g. 14, Reichsdruckerei, Berlin 1940, p. 5. (Copy of the original manual with a few small typing errors.) Retrieved on December 17, 2018. PDF; 0.1 MB ( memento from September 24, 2015 in the Internet Archive )

[2] Friedrich L. Bauer: Deciphered secrets. Methods and maxims of cryptology. 3rd, revised and expanded edition. Springer, Berlin a. a. 2000, p. 160.

[3] Michael Miller: Symmetrical encryption methods. BG Teubner Stuttgart 2003, ISBN 978-3-519-02399-9 , p. 58.

[4] Cryptocellar.org key material 1943 (PDF; 670 kB), accessed on December 17, 2018.

[5] Systematic overview of the most important terms in cryptology from technical terms of the encryption system 1957 to 1971 of the MfS / ZCO , accessed on December 17, 2018.