Patent ID: 7340610
Filing Date: 2008-03-04
Classification: H04L

Abstract:
1. A method for providing trusted time stamping in a data storage system, the method comprising: determining data being stored in the data storage system; hashing the data to generate a hash value; sending the hash value and a request for a time stamp to a time stamping authority; receiving a time stamp token and a time stamping authority certificate from the time stamping authority, the time stamp token comprising a time stamp and the hash value; and storing the time stamp token and the time stamping authority certificate in the data storage system, the time stamp and hash value providing trusted time stamping for the determined data in the data storage system; wherein storing the time stamp token and the time stamping authority certificate comprises storing the time stamp and the hash value of the time stamp token and the time stamping authority certificate in metadata for the data storage system, the metadata including a reference to the stored data; the method further comprising validating the time stamp token stored in the metadata, the validating including: wherein said storing the time stamp token and the time stamping authority certificate in the data storage system comprises: