Posts Tagged ‘PARI/GP’
AfterMath Issue 5 Is Out
It’s now the end of Semester 2 of 2008, all examinations are over and done with, and issue 5 of AfterMath is out for your reading pleasure. You can grab the latest issue here, hot off the digital press.
This issue contains articles covering topics such as:
the Hairy Ball Theorem
a differential equation variant of Gronwall’s inequality
a [...]
Filed under: Sage, cryptography, mathematics, programming | Leave a Comment
Tags: AfterMath, computer algebra system, cryptography, mathematics, maxima, PARI/GP, programming, Sage
The Shift Cipher Using PARI/GP
Representing letters
Let be the set of capital letters of the English alphabet. Furthermore, let be the ASCII (American Standard Code for Information Interchange) encodings of the upper case English letters. Then Table 1 explicitly describes the mapping . To assign a message written using the alphabet to a number, [...]
Filed under: cryptography, programming | Leave a Comment
Tags: cryptography, education, PARI/GP, programming
In studying cryptography, there are occasions in which we need to convert a string of plaintext characters into an integer. The integer corresponding to the plaintext string can then be encrypted using various encryption schemes that operate on numbers. A case in point is the RSA public key cryptosystem. Encryption and decryption [...]
Filed under: cryptography, mathematics, programming | 3 Comments
Tags: education, number theory, PARI/GP, programming
