1. An unclonable function, comprising:
a plurality of ring oscillator structures, each ring oscillator structure including a multiplexer, an inverter, groups of delay elements, a binary counter, and routing resources; and
a comparison unit to which output of each binary counter of the plurality of ring oscillator structures is routed wherein output of the comparison unit is a multi-bit value.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A system, comprising:
a wheel comprising an inboard flange portion, an outboard flange portion and a disc portion between the inboard and outboard flange portions, wherein the disc portion defines:
a receptacle which extends axially inward from an outboard surface of a transverse face of the disc portion, into an axial thickness of the disc portion and toward an opposite transverse face of the disc portion; and
a first air passageway formed within the wheel, wherein the first air passageway is in communication with an air passageway of a vehicle hub if the wheel is mounted to the vehicle hub; and
a central tire inflation valve assembly positioned within the receptacle, wherein the central tire inflation valve assembly is in communication with the first air passageway.
2. The system of claim 1, wherein:
a first end of the first air passageway is in communication with the air passageway of the vehicle hub if the wheel is mounted to the vehicle hub; and
a second end of the first air passageway is in communication with the central tire inflation valve assembly.
3. The system of claim 2, wherein the first and second ends of the first air passageway are coaxially aligned.
4. The system of claim 1, wherein only a portion of the central tire inflation valve assembly is positioned within the receptacle.
5. The system of claim 1, wherein the central tire inflation valve assembly comprises:
a hub-side port in communication with the first air passageway; and
a tire-side port in communication with a second air passageway defined by the wheel.
6. The system of claim 5, wherein the second air passageway is in communication with an interior of a tire if the tire is mounted on the wheel.
7. The system of claim 5, wherein:
a first end of the second air passageway is in communication with the tire-side port of the central tire inflation valve assembly; and
a second end of the second air passageway is in communication with the interior of the tire if the tire is mounted on the wheel.
8. The system of claim 5, wherein the central tire inflation valve assembly further comprises a valve body.
9. The system of claim 1, wherein the wheel further defines a second air passageway formed within the wheel, and wherein the second air passageway is in communication with an interior of a tire if the tire is mounted on the wheel.
10. The system of claim 9, wherein:
a first end of the second air passageway is in communication with the central tire inflation valve assembly; and
a second end of the second air passageway is in communication with the interior of the tire if the tire is mounted on the wheel.
11. The system of claim 10, wherein the first and second ends of the second air passageway are coaxially aligned.
12. A system, comprising:
a wheel comprising an inboard flange portion, an outboard flange portion and a disc portion between the inboard and outboard flange portions, wherein the disc portion defines:
a receptacle which extends from an innermost surface of a transverse face of the disc portion, into an axial thickness of the disc portion and toward an opposite transverse face of the disc portion; and
first and second air passageways formed within the wheel; and
a central tire inflation valve assembly positioned within the receptacle, wherein the central tire inflation valve assembly is in communication with the first and second air passageways, and wherein only a portion of the central tire inflation valve is positioned within the receptacle.
13. The system of claim 12, wherein the central tire inflation valve assembly is positioned within the receptacle at an outboard side of the wheel.
14. The system of claim 12, wherein the central tire inflation valve assembly is positioned within the receptacle at an inboard side of the wheel.
15. The system of claim 12, wherein the first air passageway is in communication with an air passageway of a vehicle hub if the wheel is mounted to the vehicle hub.
16. The system of claim 15, wherein the second air passageway is in communication with an interior of a tire if the tire is mounted to the wheel.
17. The system of claim 12, wherein:
the first air passageway extends from the receptacle toward a radial surface of the wheel between the inboard and outboard flange portions; and
a second air passageway extends from the receptacle toward the opposite transverse face of the disc portion.
18. The system of claim 1, wherein the first air passageway extends from the receptacle toward a radial surface of the wheel between the inboard and outboard flange portions.
19. A system, comprising:
a wheel comprising an inboard flange portion, an outboard flange portion and a disc portion between the inboard and outboard flange portions, wherein the disc portion defines:
a receptacle which extends from an innermost surface of an inboard side of a transverse face of the disc portion, into an axial thickness of the disc portion and toward an opposite transverse face of the disc portion; and
a first air passageway formed within the wheel, wherein the first air passageway is in communication with an air passageway of a vehicle hub if the wheel is mounted to the vehicle hub; and
a central tire inflation valve assembly positioned within the receptacle, wherein the central tire inflation valve assembly is in communication with the first air passageway, and wherein only a portion of the central tire inflation valve assembly is positioned within the receptacle.
20. The system of claim 19, wherein the first and second ends of the first air passageway are axially offset from each other.
21. The system of claim 19, wherein:
a first end of the first air passageway is in communication with the air passageway of the vehicle hub if the wheel is mounted to the vehicle hub; and
a second end of the first air passageway is in communication with the central tire inflation valve assembly.
22. The system of claim 19, wherein the central tire inflation valve assembly comprises:
a hub-side port in communication with the first air passageway; and
a tire-side port in communication with a second air passageway defined by the wheel.
23. The system of claim 22, wherein the second air passageway is in communication with an interior of a tire if the tire is mounted on the wheel.
24. The system of claim 22, wherein:
a first end of the second air passageway is in communication with the tire-side port of the central tire inflation valve assembly; and
a second end of the second air passageway is in communication with the interior of the tire if the tire is mounted on the wheel.
25. The system of claim 22, wherein the central tire inflation valve assembly further comprises a valve body.
26. The system of claim 19, wherein the wheel further defines a second air passageway formed within the wheel, and wherein the second air passageway is in communication with an interior of a tire if the tire is mounted on the wheel.
27. The system of claim 26, wherein:
a first end of the second air passageway is in communication with the central tire inflation valve assembly; and
a second end of the second air passageway is in communication with the interior of the tire if the tire is mounted on the wheel.
28. The system of claim 27, wherein the first and second ends of the second air passageway are coaxially aligned.
29. The system of claim 19, wherein the first air passageway extends from the receptacle toward a radial surface of the wheel between the inboard and outboard flange portions.