V l l l
PREFACE
Implementing encryptio n scheme s i s considerabl y easie r wit h th e us e of
the computer . Ther e ar e JavaScrip t programs , whic h ar e availabl e fro m th e
webpage fo r thi s boo k an d ru n o n th e user' s computer , fo r al l th e cipher s
introduced i n thi s book . Informatio n abou t thes e program s i s containe d i n
Chapter 24 .
This boo k i s based o n materials tha t I use i n m y course, Topic s i n Mod -
ern Math : Cipher s an d Codes , a t Loyol a Colleg e i n Maryland . Th e course ,
which ha s n o prerequisites , satisfie s Loyola' s cor e mathematica l science s re -
quirement an d i s take n primaril y b y humanitie s majors . Th e cours e wa s
originally develope d i n th e earl y 1990s wit h th e suppor t o f a Loyol a Col -
lege Summe r Teachin g Gran t an d wa s significantl y enhance d b y a year-lon g
College sabbatica l i n 1998-99. I a m gratefu l fo r tha t support . Eac h tim e
I hav e taugh t th e course , I hav e foun d way s t o improv e th e cours e materi -
als usin g comment s an d suggestion s fro m m y students . I t wa s thei r voice s
that I hear d i n th e backgroun d an d whic h I hav e trie d t o kee p i n min d a s I
prepared thi s book .
I a m thankfu l t o man y peopl e wh o have contribute d t o m y developmen t
as a teacher o f mathematics. I have bee n fortunat e t o hav e spen t m y caree r
at tw o institutions that valu e teaching, Hamilto n Colleg e and Loyol a Colleg e
in Maryland. I have learned muc h fro m m y departmental colleague s a t bot h
institutions. Sadly , two of the mos t influentia l colleagues , Joh n T . Anderso n
and Georg e Mackiw , ar e n o longe r living ; bot h wer e broadly-rea d mathe -
maticians wh o care d deepl y abou t thei r students . I t wa s Gordo n Pritchet t
who first taugh t m e ho w t o writ e mathematics .
Several peopl e playe d significan t role s i n th e developmen t o f thi s boo k
and I a m gratefu l t o them . Joh n Hennesse y first suggeste d th e basi c ap -
proach t o th e course , that th e "stor y lin e comes first," precedin g th e mathe -
matics. Eric a Flappan , on e of my first student s a t Hamilto n an d no w a pub-
lished autho r herself , encourage d m e to submit m y materials fo r publication .
David Hadda d supporte d addin g thi s projec t t o m y administrativ e respon -
sibilities. Edwar d Dunne , Edito r fo r th e Boo k Progra m a t th e America n
Mathematical Society , mad e man y valuabl e suggestion s a s wel l a s provide d
general encouragement. Emili e Kulis read the entire manuscript, worke d th e
exercises, checke d the compute r programs , mad e man y excellen t suggestion s
for improvement , an d assiste d m e i n so many othe r ways , goin g well beyon d
her responsibilitie s a s m y executiv e administrativ e assistant . I coul d no t
have complete d th e projec t o n tim e withou t he r help . Finally , m y wonder -
ful husban d Davi d gav e m e hi s unwaverin g suppor t an d encouragemen t al l
along th e way , a s h e alway s does .
Previous Page Next Page