| 摘要 |
The present invention is directed to a CD comprising: electrical data storage; and electrical I/O means, for enabling accessing the electrical data storage by an external device. The electrical data storage may include a smart card memory, a magnetic stripe, a proximity card, and so forth. The electrical data storage may comprise a USB connector, a FireWire connector, and so forth. The connector may be adapted to be folded or detached, thereby enabling the CD to fit a wallet. The electrical storage means may store a key for decrypting at least some content of the optical storage means of the CD. The CD may further comprise circuitry, for rendering at least one function with a content of the electrical data storage, such as providing content to an external device, authentication, encryption or decryption, digital rights management, and security.
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