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Online auctions of governmental bonds and CO2 certificates are challenged by high availability requirements in face of high peak loads around the auction deadline. Traditionally, these requirements are addressed by cluster solutions. However, with strong requirements regarding hardware ownership and only a few auctions per owner per year hardware clusters are a rather ineffective solution.Consequently,...
A secure digital timestamp can assert the existence of a particular document at a specific point in time. While centralized timestamp servers show dependability drawbacks with respect to node or link failures, e.g., outages of the Internet connectivity, distributed timestamping protocols don't have these drawbacks, but are nowadays rarely seen in practice because of the distributed trust requirements...
The security of electronic transactions depends on the security of the user's terminal. An insecure terminal may allow an attacker to create or manipulate transactions. Several techniques have been developed that help to protect transactions performed over insecure terminals. TAN codes, security tokens, and smart cards prevent an attacker who obtained the user's password from signing transactions...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.