| http://www.w3.org/ns/prov#value | - The personal security system of claim 10, wherein said encrypted portion is encrypted with an encryption algorithm that is operable to rotate said timing information which is in the form of an n-bit data word by m-bits then XOR the result of the rotated timing information with the first n bits of said User ID, said User ID being a data field of a length z x n, where z is an integer, then rotatin
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