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The physical characteristics of these cards are their weight, 0.07 ounces, their size, one sixth of a credit card (32 mm x 24 mm x 2.1 mm) particularly lends them to communicating mobile markets: personal assistants/PDA, MP3 drivers, Mobile phones, also to digital equipment such as cameras and videos. DANE-ELEC's Secure Digital TM range comprises 6 cards with 16, 32, 64, 128, 256 and 512 MB of memory capacity. Their rate of data-transfer varies between 2 and 4 MB per second. Compared to the Multi Media Card TM composed of 7 connexion pins, the Secure Digital TM card is composed of 9 connexion pins. This new organisation allows faster transfer of data while the memory card is on SD mode. On the other hand, the Secure Digital TM has an integrated security mechanism, the CPRM - Content Protection for Recorder Media - which insures a high degree of protection and file-encryption. It controls the reading, copying, transfer or erase functions. In this way it becomes possible for the user to forbid or authorize the copy or to offer a reproduction right.