Ken Kuroiwa
ABSTRACT
With recent significant development in e-commerce services, most major portal sites have gained popularity by setting up cybermalls. However, these cybermalls provide acknowledgment of order only by e-mail. Since the evidential capacity of e-mail is low from the viewpoint of digital forensics, we propose a method for preserving records of transactions for both customers and service providers by generating hysteresis signatures using cellular phones. The main feature of this method is the ability to prevent or detect falsification and deletion of records and to save evidence of a transaction without using any special device. We describe the proposed method and discuss its application to the ecommerce system we developed..
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