Hewlett-packard Development Company, L.p.

Alberto Such Vicente

Helen Balinsky

In an example, a data structure comprises a first genesis record having an associated authentication value and a plurality of subsequent records arranged in an order, wherein at least one subsequent record includes the authentication value associated with the first genesis record and an authentication value associated with another record in the data structure. A method may include designating one of the subsequent records as a second genesis record, acquiring an authentication value for the second genesis record, deleting at least one record preceding the second genesis record in the data structure and adding a further record to the data structure wherein the further record includes the authentication value of the second genesis record and an authentication value associated with a directly preceding record in the data structure.

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Sant Cugat del Valles, Spain

Alberto Such Vicente