Patent application number | Description | Published |
20100043797 | COMBINED REBREATHER BAIL OUT VALVE AND LOOP VOLUME VALVE - A device that combines the function of a rebreather bail out valve and loop volume valve (also known as an Automatic Diluent Valve), using a single pressure or flow regulator, with preferred embodiments providing a bipolar or tripolar action. The device can provide an automatic loop shut off capability. | 02-25-2010 |
20100051604 | SAFE PLANAR ELECTRICAL HEATER - An electrical heater element containing one or more sense wires located at a point or points between the power terminals that provides a voltage signal that is compared with a predefined level or ratio, to trigger a power supply trip should the sense voltage fall outside those limits. | 03-04-2010 |
20100052922 | REBREATHER OXYGEN RISK ALARM - A device that indicates a hypoxia risk or hyperoxia risk, or analogue thereto, using an integral value that is reset when a user activates a switch and which integrates over time from each reset event as a function calculating the PPO2 deviation from parameters that include ambient pressure changes or derivatives thereof and physiological parameters or analogues thereof, from which a metabolic parameter is calculated. | 03-04-2010 |
20110260749 | SYNCHRONOUS LOGIC SYSTEM SECURED AGAINST SIDE-CHANNEL ATTACK - An improvement in the security of a logic system from attacks that observable features such as the power supply or electromagnetic radiation, so called, “side-channel attacks”. Specifically, the present invention comprises a technique and method for reducing ability to monitor the relationship between currents in the system and the data in the system by closing the overall clock eye diagram, whilst keeping the eye diagram for connected stages open. The degree of eye closure for connected pipeline stages allows the system to run closer to its maximum operating speed compared to the use of system wide clock jitter, yet the overall closure provides security that is absent from systems with a partially open eye. | 10-27-2011 |
20110285420 | LOGIC SYSTEM WITH RESISTANCE TO SIDE-CHANNEL ATTACK BY EXHIBITING A CLOSED CLOCK-DATA EYE DIAGRAM - An improvement in the security of a logic system by minimising observable features such as the power supply or electromagnetic radiation, so called, “side-channel attacks”. Specifically, the present invention comprises a technique and methods for reducing the ability of an intruder to monitor the relationship between currents in the system and the data in the system through the use of a randomised clock wherein the clock eye diagram is closed and without significant reduction in maximum operating speed compared to the reduction in maximum operating frequency that occurs when using conventional means of additive jitter. A system where the clock eye diagram is completely closed is provably more secure than systems where the clock eye diagram is partially open. | 11-24-2011 |
20110285421 | SYNCHRONOUS LOGIC SYSTEM SECURED AGAINST SIDE-CHANNEL ATTACK - An improvement in the security of a logic system from attacks that observable features such as the power supply or electromagnetic radiation, so called, “side-channel attacks”. Specifically, the present invention comprises a technique and method for reducing ability to monitor the relationship between currents in the system and the data in the system by closing the overall clock eye diagram, whilst keeping the eye diagram for connected stages open. The degree of eye closure for connected pipeline stages allows the system to run closer to its maximum operating speed compared to the use of system wide clock jitter, yet the overall closure provides security that is absent from systems with a partially open eye. | 11-24-2011 |
20110289593 | MEANS TO ENHANCE THE SECURITY OF DATA IN A COMMUNICATIONS CHANNEL - A technique and method for creating a provably secure communications channel between two devices making the observation, recovery and modification of the data within the communications channel difficult. Specifically, the present invention compromises a technique and method for protecting the data within a data channel where security must be assured. | 11-24-2011 |
20110299678 | SECURE MEANS FOR GENERATING A SPECIFIC KEY FROM UNRELATED PARAMETERS - A technique and method for improving the security of the usage of a key in devices or systems with modes of operation that must be secured whereby the key has multiple fields with timing information that must be matched to transitions of a randomly generated clock, the randomly generated clock derived from a fixed frequency clock, whereby tampering of the fixed frequency clock will result in detection of the security attack and exit from the secure mode of operation. | 12-08-2011 |