By Simon Singh
It’s referred to as the technological know-how of secrecy. Cryptography: the encoding and interpreting of personal info. And it truly is history’s so much interesting tale of intrigue and crafty. From Julius Caesar and his Caesar Cipher to the code utilized by Mary Queen of Scots and her conspiracy to using the Engima laptop in the course of the moment global struggle, Simon Singh follows the evolution of mystery writing.
Accessible, compelling, and well timed, this foreign bestseller, now tailored for kids, is bound to make readers see the past—and the future—in a complete new approach.
Read or Download The Code Book: How to Make It, Break It, Hack It, Crack It PDF
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Additional resources for The Code Book: How to Make It, Break It, Hack It, Crack It
Sample text
I shall stick to the convention of keeping ciphertext letters in upper case, while putting plaintext letters in lower case. This will help to distinguish between those letters we still have to identify, and those that have already been established. PCQ VMJiPD LhiK LiSe KhahJaWaV haV ZCJPe EiPD KhahJiUaJ LhJee KCPK. CP Lhe LhCMKaPV aPV IiJKL PiDhL, QheP Khe haV ePVeV Lhe LaRe CI Sa’aJMI, Khe JCKe aPV EiKKev Lhe DJCMPV ZeICJe h i S, KaUiPD: “DJeaL EiPD, ICJ a LhCMKaPV aPV CPe PiDhLK i haNe ZeeP JeACMPLiPD LC UCM Lhe IaZReK CI FaKL aDeK aPV Lhe ReDePVK CI aPAiePL EiPDK.
Although Elizabeth despised Mary, she had several reasons for being reluctant to see her put to death. First, Mary was a Scottish queen, and many questioned whether an English court had the authority to execute a foreign head of state. Second, executing Mary might establish an awkward precedent—if the state is allowed to kill one queen, then perhaps rebels might have fewer reservations about killing another, namely Elizabeth. Third, Elizabeth and Mary were cousins, and their blood tie made Elizabeth all the more squeamish about ordering her execution.
All of this relied on an effective system of administration, and in turn the administrators relied on secure communication achieved through the use of encryption. As well as encrypting sensitive affairs of state, it is documented that officials protected tax records, demonstrating a widespread and routine use of cryptography. Further evidence comes from many administrative manuals, such as the tenth-century Adab al-Kuttāb (“The Secretaries’ Manual”), which include sections devoted to cryptography.