ISBN-13: 9781568810829 / Angielski / Twarda / 1999 / 198 str.
A revised and updated translation of a work originally published in Portuguese in 1997. It introduces the algorithmic aspects of number theory and its applications to the study of codes, and of code-breaking. The work ends with study of the Rivest, Shamir, and Aldeman (RSA) public key cryptosystem,