According to one embodiment, an information processing apparatus which conducts display of video and output of audio from video and audio information including video data and audio data, includes a processor which can execute various softwares, a memory which stores data therein, and a decoder which is configured from a software configured from a plurality of modules and executed by the processor in order to perform a processing for conducting display of video and output of audio, where the decoder causes the processor to perform a processing for partially encrypting data transferred between the modules via the memory and a processing for decoding the data transferred between the modules via the memory.