The book of codes : understanding the world of hidden messages : an illustrated guide to signs, symbols, ciphers, and secret languages /

Codes and ciphers /
by: Wrixon, Fred B.
Published: (1992)

Secret codes /
by: Fletcher, Helen Jill, 1910-
Published: (1980)

Top secret : a handbook of codes, ciphers, and secret writing /
by: Janeczko, Paul B.
Published: (2004)

Secret writing--codes and messages /
by: Baker, Eugene H.
Published: (1980)

Can you crack the code? : a fascinating history of ciphers and cryptology /
by: Schwartz, Ella, 1974-
Published: (2019)

Codes, ciphers & other cryptic & clandestine communication : making and breaking secret messages from hieroglyphs to the Internet /
by: Wrixon, Fred B.
Published: (1998)

Cloak and cipher /
by: Moore, Dan Tyler
Published: (1962)

Secrets, signs, signals & codes /
by: Lewis, Shari
Published: (1980)

All kinds of codes /
by: Babson, Walt
Published: (1976)

Codes and cryptography /
by: Welsh, D. J. A.
Published: (1988)

Secret messages : concealment, codes, and other types of ingenious communication /
by: Butler, William S.
Published: (2001)

The Cat's elbow and other secret languages /
Published: (1982)

Secret language /
by: Blake, Barry J.
Published: (2010)

The code book : the science of secrecy from ancient Egypt to quantum cryptography /
by: Singh, Simon
Published: (2000)

Solving German codes in World War I : [with an added special "code problem" for the student] /
by: Friedman, William F. (William Frederick), 1891-1969
Published: (1977)

Secret warfare : the battle of codes and cyphers /
by: Norman, Bruce
Published: (1989)

Codes and ciphers : Julius Caesar, the Enigma, and the internet /
by: Churchhouse, R. F.
Published: (2002)

Cryptology yesterday, today, and tomorrow /
Published: (1987)

Selections from Cryptologia : history, people, and technology /
Published: (1998)

Computer cryptology : beyond decoder rings /
by: Boyd, Waldo T.
Published: (1988)

Mercury: or, The secret and swift messenger : shewing how a man may with privacy and speed communicate his thoughts to a friend at any distance /
by: Wilkins, John, 1614-1672
Published: (1695)

Cryptanalysis for microcomputers /
by: Foster, Caxton C., 1929-
Published: (1982)

Geometries, codes and cryptography /
Published: (1990)

Mr. Babbage's secret : the tale of a cypher and APL /
by: Franksen, Ole Immanuel
Published: (1985)

Cryptomenysis patefacta:, or, The art of secret information disclosed without a key. : Containing, plain and demonstrative rules, for decyphering all manner of secret writing with exact methods, for resolving secret intimations by signs or gestures, or in speech. : As also an inquiry into the secret ways of conveying written messages, and the several mysterious proposals for secret information, mentioned by Trithemius, &c. /
by: J. F. (John Falconer)
Published: (1685)

Codes and ciphers /
by: Pennycook, Andrew
Published: (1980)

The woman who smashed codes : a true story of love, spies, and the unlikely heroine who outwitted America's enemies /
by: Fagone, Jason
Published: (2017)

Codes and ciphers /
by: D'Agapeyeff, A. (Alexander)
Published: (1939)

Codes, ciphers, and computers : an introduction to information security /
by: Bosworth, Bruce
Published: (1982)

Cipher code /

United States diplomatic codes and ciphers, 1775-1938 /
by: Weber, Ralph E. (Ralph Edward), 1926-
Published: (1979)

Secret and urgent : the story of codes and ciphers /
by: Pratt, Fletcher, 1897-1956
Published: (1942)

Secret and urgent : the story of codes and ciphers /
by: Pratt, Fletcher, 1897-1956
Published: (1939)

The history of codes and ciphers in the United States prior to World War I /
Published: (1978)

The History of codes and ciphers in the United States during the period betwen the World Wars /
Published: (1979)

Secret writing : an introduction to cryptograms, ciphers and codes /
by: Lysing, Henry
Published: (1936)