| 摘要 |
A multifunction computerized screenphone (100) provides on-line transaction capability for credit card transactions. A highly reliable signature verification scheme utilizes a verification method (64) based upon the writing dynamics of the making of the signature, thus providing security for the vendor as well as protecting the user. Additional features which enhance the utility of the screenphone include an answering machine (60) which uses digitized voice recordings, which are compressed so that it is practical to use low cost readily available floppy drive technology. PCMCIA ports (130, 140) further enhance the flexibility of the screenphone by allowing the user to attach various external devices, such as PDA memory (142), an external keyboard (66) and a magnetic stripe reader (132) for credit card purchases. |
