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+In determining correctness, a major concern is determining that the message hasn't been tampered with by an intelligent intermediate.
+Public key cryptography tries to answer this problem by providing proof of authorship and, as an extension of ``normal'' encryption, preventing interception.
+RSA is one such algorithm.
+It works by providing a set of public keys to all parties, and corresponding secret private keys. 
+
+One of the simpler algorithms, it applies the NP-hard nature of factorizing a semiprime, Euler’s theorem, and the Euclidean Algorithm to encrypt communication.
+Because it is simple to devise, it has been included as a sample, in the form of a Python script which encrypts and decrypts messages, given a small RSA key (compared to those used in real applications).
+There are several optimizations (such as applying the Chinese Remainder Theorem) which can be used, but none have been applied to maintain the code's simplicity.