A semiconductor memory card which allows consumers to access and purchase content
while protecting the copyright of the content. The memory card has a unique media
ID assigned thereto and includes a secure data area and a non-secure data area.
The secure are is accessible by an apparatus whose authenticity is verified, and
the non-secure area is accessible by the apparatus regardless of such verification.
The secure area stores a first encrypted content which is generated by encrypting
a first content key by using the media ID, and the non-secure data area stores
trial data and purchase data which can be decrypted. The trial data includes a
first content which is encrypted by using the first content key, and the purchase
data includes a second content which is encrypted by using a second content key.
The purchase data can be decrypted when fee processing is performed.
