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Results tagged with pen-and-paper
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user 1401
The term "pen and paper" can practically be interpreted as "using no tools like electronic devices", since it targets cryptographic functions, schemes, and procedures which can be handled by humans who have nothing more available than the option to use manual writing. So, "pen and paper" can also mean "pencil and post-it", "chalkboard and chalk", "wall and spraycan", etc. Mental calculations and reasoning processes are also included.
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What is the most secure hand cipher?
By "hand cipher", I mean a symmetric cipher for which encryption and decryption can can both be performed with a pencil on graph paper, consuming about 10-20 seconds per character by a proficient user …
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