Title:
小型デバイスにおける暗号署名を使用した否認防止方法
Document Type and Number:
Japanese Patent JP2004524779
Kind Code:
A
Abstract:
A method for providing electronical signing of data using a limited signing device is disclosed. This is achieved by extracting a part of the data in a signature using system, compiling it to a proper protocol used by the signing device and transferring it to said signing device together with a hash of the data. The user of the signing device will then be presented to the compiled part of the data which is adjusted according to the limitations of the signing sevice and which is understandable for the user. The user may then electronically sign the data by means of the signing device using an appropriate signature algorithm. A correct hash proves that the user really signs the intended data, even if he is presented only to an understandable and signing device adjusted part of the data. The resulting signature is returned to the signature using system, and the original data, the part of the data, the hash and the signature are sent to a signature receiving system for processing, verification, storing, etc.
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Inventors:
Tonnesland, Suvere
Byulses, Paul
Byulses, Paul
Application Number:
JP2002584534A
Publication Date:
August 12, 2004
Filing Date:
April 12, 2002
Export Citation:
Assignee:
Telephone Activola Get Elm Ericsson (Pubble)
International Classes:
H04L9/32; (IPC1-7): H04L9/32
Attorney, Agent or Firm:
Sonoda Yoshitaka
Kobayashi Yoshinori
Kobayashi Yoshinori