Patent ID: 7974415

Claim:
A provider system configured to execute instructions recorded on a non-transitory computer-readable storage medium, the provider system for providing a sequence of public keys to a receiver system, wherein each public key of the sequence is related to a private key and is applicable for a public key cryptography procedure, the provider system comprising: a computing unit configured to: generate the sequence of public keys and related private keys, and secure at least a sub-sequence of the sequence of public keys, each public key of the sub-sequence being contained within a corresponding data set of a plurality of data sets, including recursively applying, for each data set and contained public key of the sub-sequence, a hash function to a following data set of the plurality of data sets that includes a further public key, to thereby obtain a proof value for inclusion in each data set of the plurality of data sets; and a sending unit configured to provide the plurality of data sets to the receiver system.