A controller of a reproduction terminal determines whether a block read from a memory card is an encrypted block or a non-encrypted block, and then applies the read block to a content decrypting circuit. The controller stops supplying the block to the content decrypting circuit when a predetermined number of non-encrypted blocks are continuously read from the memory card. Consequently, reproduction of the encrypted content data can be stopped if the encrypted content data includes a continuous non-encrypted portion in which the number of non-encrypted blocks is equal to or larger than a predetermined non-zero number.