An information processing apparatus for using key information calculated on the basis of predetermined information including information obtained from an IC chip as a communication party on the other end in order to perform encryption processing with the IC chip. The information processing apparatus includes: among a plurality of calculation modules for calculating the key information being individually different in accordance with predetermined algorithms, control means for causing the calculation module identified by identification information input from the outside to calculate the key information; and encryption means for encrypting data by the key information calculated.