21. A method for digitally processing descriptive statements about electronic documents for purposes of verifying authenticity of said statements, the method comprising: computing a hash independently for each descriptive statement, to obtain multiple statement-hashes; applying a function to the multiple statement-hashes to generate an aggregate hash, wherein the aggregate hash is characterized that its value is order-independent relative to the order in which the multiple statement-hashes are processed; and digitally-signing the aggregate hash.
21. A method for digitally processing descriptive statements about electronic documents for purposes of verifying authenticity of said statements, the method comprising: computing a hash independently for each descriptive statement, to obtain multiple statement-hashes; applying a function to the multiple statement-hashes to generate an aggregate hash, wherein the aggregate hash is characterized that its value is order-independent relative to the order in which the multiple statement-hashes are processed; and digitally-signing the aggregate hash. 24. The method according to claim 21 , wherein said method is used to authenticate descriptive statements retrieved from a remote data store, by: retrieving a verification hash from the remote data store; computing the aggregate hash based upon the descriptive statements retrieved from the remote data store, without first sorting the statements to reorder them; comparing the aggregate hash with the verification hash; and determining authenticity of the descriptive statements retrieved from the remote data store in dependence upon the comparison.