Changes

If you're used to looking at the AES algorithm, this one probably looks extremely simple. However, it is surprisingly secure. As of 2016, very few attacks on TEA are known - the best cryptanalysis results require <math>2^{121.5}</math> guesses against a shortened version of the algorithm! The only real weakness is that every key has three other equivalent keys - that is, there are four different keys that all give the exact same encrypted output. This is not a showstopper because <math>2^{126}</math> keys is still too many to brute-force(it does mean the algorithm is a poor choice for certain applications such as hashes, something the [https://web.archive.org/web/20090416175601/http://www.xbox-linux.org/wiki/17_Mistakes_Microsoft_Made_in_the_Xbox_Security_System#The_TEA_Hash XBox security missed]).