Patent ID: 9245155
Filing Date: 2016-01-26
CPC Classification: G06F,H04L

Claim Text:
1. An apparatus comprising: a portable storage device capable of storing encrypted information; a decryption apparatus coupled to said portable storage device; a radio receiver responsive to a radio signal from a radio transmitter and configured to generate a key elimination signal based on a failure to receive said radio signal, wherein said failure to receive said radio signal is based on a proximity between said radio transmitter and said radio receiver, such that said radio transmitter must be continuously proximate to said radio receiver to prevent said key elimination signal from being generated and when said radio transmitter is greater than a predetermined distance from said radio receiver said key elimination signal is generated; a storage circuit configured to store a plurality of decryption keys, wherein said plurality of decryption keys can be used to decrypt information stored on said portable storage device; a key elimination circuit configured to trigger said storage circuit thereby causing the elimination of a first non-empty subset of said plurality of decryption keys, without eliminating a second non-empty subset of said plurality of decryption keys, wherein said key elimination circuit is responsive to said key elimination signal, such that the elimination of said a first non-empty subset of decryption keys is triggered by a physical movement between said radio transmitter and said radio receiver.