Primitive operations in RC5

Question

Explain the primitive operations which are used in the RC5?

Answer 1

RC5 uses the three primitive operations (and their inverse):

a) Addition : Addition of the words, represented by +, is performed modulo 2w. The inverse operation, represented by -, is subtraction modulo 2w.

b) Bitwise exclusive-OR : This operation is represented by “⊕”.

c) Left circular rotation : The cyclic rotation of word x left by y bits is represented by x<<<y. The inverse is the right circular rotation of word x by y bits, represented by x>>>y.