METHOD FOR SIGNING A DATA SET IN A PUBLIC KEY SYSTEM AND DATA PROCESSING SYSTEM FOR CARRYING OUT SAID METHOD

摘要

A method for signing a dataset in a public key system is provided. An unsigned dataset is produced. The data set receives a first signature by producing a first signature using a first secret or private key from a pair of keys associated with an authorized person, the pair of keys comprising a public and secret key. The dataset is checked to see if the dataset is provided with the first signature or with other signatures of authorized persons. At least the dataset is provided with a second signature from a second authorized person by producing a third signature using the secret point if the dataset has already been signed by a predetermined number of authorized persons. A signed dataset is produced, the data set comprising at least the unsigned dataset and the third signature produced using the secret or private key of the signature point.