from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A book that lists the symbols of a code and their meanings.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun cryptography A book, table, database, or other object that stores the mapping between plaintext words or phrases and their equivalents in a code.
  • noun computer science A lookup table.


from Wiktionary, Creative Commons Attribution/Share-Alike License

code +‎ book.


  • The evolution has created something of a 'codebook' of behaviour within the private sector of file-sharing.

    p2pnet news

  • Nevertheless, he went through the motions of unlocking the safe and opening the codebook and checking the authentication tables again.

    The Omega Theory

  • He pulled out the June 13 codebook and turned to the EAM authentication tables.

    The Omega Theory

  • The evolution has created something of a ‘codebook’ of behaviour within the private sector of file-sharing.

    DarkNets: not tomorrow, but here and now

  • A telegram to Government House in Nairobi could not be decoded because the keys to the safe holding the codebook were unavailable.

    The day Princess Elizabeth became Queen

  • Karsten Nohl, 28, told The Associated Press this week that he, working with others online and around the world, created a codebook containing how to get past the GSM standard encryption used to keep conversations on more than 3 billion mobile phones safe from prying ears.

    Guide To Breaking Cell Phone Security REVEALED

  • The purpose of the codebook is not as an instructional device, but to cover the Department of Education in the event a parent sues charging discrimination against a son or daughter.

    Alan Singer: Bizarro Bloomberg School Deform #2

  • I discarded my last codebook when we moved to Mexico.

    Toilet Paper

  • Authorized users of the Enigma machine had access to a codebook which determined the base key value for a given period of time originally monthly or weekly, but over time this shifted to daily or even many times per day.

    February « 2009 « Publius the Geek’s Blog

  • According to my codebook, to lay a foundation for similar transactions such as this, or for any past event, foundation equals the time, the location, any other witnesses, any other comments that were made, and the witness ` state of mind at the time of the incident.

    CNN Transcript Apr 22, 2005


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