In Code: A Mathematical JourneyIn January 1999, Sarah Flannery, a sportsloving teenager from Blarney in County Cork, Ireland, was awarded Ireland's Young Scientist of the Year for her extraordinary research and discoveries in Internet cryptography. The following day, her story began appearing in Irish papers and soon after was splashed across the front page of the London Times, complete with a photo of Sarah and a caption calling her "brilliant." Just sixteen, she was a mathematician with an international reputation. IN CODE is a heartwarming story that will have readers cheering Sarah on. Originally published in England and cowritten with her mathematician father, David Flannery, IN CODE is "a wonderfully moving story about the thrill of the mathematical chase" (Nature) and "a paean to intellectual adventure" (Times Educational Supplement). A memoir in mathematics, it is all about how a girl next door, nurtured by her family, moved from the simple math puzzles that were the staple of dinnertime conversation to prime numbers, the Sieve of Eratosthenes, Fermat's Little Theorem, googolsand finally into her breathtaking algorithm. Parallel with each step is a modest girl's own selfdiscoveryher values, her burning curiosity, the joy of persistence, and, above all, her love for her family. 
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Review: In Code: A Mathematical Journey
User Review  Scarlett Sims  GoodreadsAs a teenager, Sarah Flannery won a few international science competitions with a project about an encryption algorithm. Though it turned out that the algorithm couldn't be used for public key ... Read full review
Review: In Code: A Mathematical Journey
User Review  Patrick  GoodreadsFirstperson view of a mathematical explorer and her family environment during her transition to adulthood and global awareness of her achievements. Read full review
Contents
Early Influences  3 
Early Challenges  8 
Beginning My First Project  32 
Mathematical Excursions  41 
Dads Evening Class  43 
Of Prime Importance  47 
The Arithmetic of Cryptography  71 
Sums with a Difference  113 
Young Scientist 99  218 
AfterMath  229 
Media Blitz  231 
Around the World and Back  254 
About This Book  269 
CryptographyA New Algorithm Versus the RSA  271 
Answers to Miscellaneous Questions  297 
Euclids Algorithm  305 
One Way Only  149 
Public Key Cryptography  164 
Exhibition Time  187 
Young Scientist 98  189 
The Birth of a Project  194 
The Euler ϕfunction and the EulerFermat Theorem  315 
Acknowledgments  320 
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