Method for checking postage stamps on letters and parcels
OwnerJurgen Lang, Bernd Meyerinventors
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Abstract
The invention relates to a method for checking postage stamps on letters and parcels, at a checkpoint. Said checkpoint deciphers the identity and authenticity of a customer system having generated the production of the stamp by decoding cryptographic security elements originating from a trusted certification point. According to the invention, this method is carried out in such a way that means contained in the checking unit determine a key for which the probability of having been used to encode the data at the certification point is particularly high.
Claims5
A method in which postage indicia applied onto mailpieces are checked in a checking station, whereby the checking station, by decrypting cryptographic security elements stemming from a reliable certification station, deciphers the identity and authenticity of a customer system that has generated the postage indicia,
- characterized in that a means present in the checking station selects a key for which the probability that it was used for the encryption of the data in the certification station is especially high.
Dependencies are inferred from the claim text.