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Methods and Systems to Create Big Memorizable Secrets and Their Applications in Information Engineering

  • US 20110055585A1
  • Filed: 12/18/2008
  • Published: 03/03/2011
  • Est. Priority Date: 07/25/2008
  • Status: Abandoned Application
First Claim
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1. A method to create big and yet memorizable (or mnemonic) secret as password and passphrase beyond 128 bits for various applications in information engineering, especially MePKC (Memorizable Public-Key Cryptography) using fully memorizable private key, by selecting and using one or a hybrid combination of the listed options here, wherein they are consisting of:

  • (a) using self-created signature-like Han character of CLPW (Chinese Language Password) and CLPP (Chinese Language Passphrase) characterized by phonetic encoding of hanyu pinyin, structural encoding of sijiao haoma (aka four-corner method), textual semantic noises, uniquely self-created signature-like symbol, and higher randomness;

    (b) using two-dimensional key (2D key) characterized by possible key styles of multiline passphrase, crossword, ASCII art/graphics, Unicode art/graphics, colorful text, sensitive input sequence, as well as partially, fully, and extraordinary filled in user-selected matrix-like 2D field;

    (c) using multilingual key characterized by black-and-white or colorful Unicode graphic symbols for a key space in tabular pages with optional grid partitioning;

    (d) using multi-tier geo-image key characterized by a generated graphical password/key from series of geographical images called geo-images, and textual password/key of normal text hinted by the geo-images; and

    (e) using multi-factor key using software token characterized by the feature, where for 2n-bit MePKC, an n-bit symmetric key can use n-bit symmetric cipher to encrypt a 2n-bit hash of various digital multimedia data like random or non-random bitstream, text, image, audio, animation, or video.

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