The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
By analyzing some current fair E-cash schemes, we find they are not always “fair” or “practical”. So we present a new scheme based on group signature with the problems solved. In our improved E-cash system, bank performs “double-spending owner tracing” and trusted authority performs “unconditional owner tracing” and “unconditional coin tracing” when necessary. Then we provide security proofs of our...
This paper introduces a new digital signature primitive that allows a proxy signer to sign messages on behalf of the original signer, in a way that do not allow the recipient of the signature to disclose the contents of the signed information to any third party without the proxy signer's consent. The above primitive, called proxy chameleon signature enjoys all the attributes in the normal proxy signature...
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.