1. A measuring device for at least one of (a) measuring a distance between the measuring device and at least one object and (b) measuring a speed difference between the measuring device and the at least one object, comprising:
an emission device adapted to send a transmission signal that includes at least two signal portion sequences, each of a first signal portion sequence and a second signal portion sequence including at least two temporally alternating signal portions, the at least two signal portions of the first signal portion sequence differing in frequency by a first differential frequency, the at least two signal portions of the second signal portion sequence differing in frequency by a second differential frequency, wherein the first differential frequency of the first signal portion sequence differing from the second differential frequency of the second signal portion sequence.
2. The measuring device according to claim 1, wherein the measuring device is adapted to be arranged in a motor vehicle.
3. The measuring device according to claim 1, further comprising a reception device adapted to receive a reflection signal of the transmission signal reflected by the at least one object.
4. The measuring device according to claim 3, further comprising a mixer adapted to mix the first signal portion sequence with a portion of the first signal portion sequence of the reflection signal reflected by the at least one object to form a first mixed signal.
5. The measuring device according to claim 4, further comprising an evaluation device adapted to ascertain one of (a) a measured frequency and (b) frequencies of the first mixed signal.
6. The measuring device according to claim 5, wherein the evaluation device is adapted to determine the distance between the measuring device and the at least one object as a function of the one of (a) the measured frequency and (b) the frequencies of the first mixed signal.
7. The measuring device according to claim 5, the evaluation device is adapted to determine the speed difference between the measuring device and the at least one object as a function of the one of (a) the measured frequency and (b) the frequencies of the first mixed signal.
8. The measuring device according to claim 4, wherein the mixer is adapted to mix the second signal portion sequence with a portion of the second signal portion sequence of the reflection signal reflected by the at least one object to form a second mixed signal.
9. The measuring device according to claim 8, wherein the evaluation device is adapted to ascertain the one of (a) a measured frequency and (b) frequencies of the second mixed signal.
10. The measuring device according to claim 9, wherein the evaluation device is adapted to determine the distance between the measuring device and the at least one object as a function of the one of (a) the measured frequency and (b) the frequencies of the first mixed signal and of a dominating frequency of the second mixed signal.
11. The measuring device according to claim 9, wherein the evaluation device is adapted to determine the speed difference between the measuring device and the at least one object as a function of the one of (a) the measured frequency and (b) the frequencies of the first mixed signal and of the one of (a) the measured frequency and (b) the frequencies of the second mixed signal.
12. The measuring device according to claim 8, wherein the evaluation device is adapted to determine a difference between a phase of the first mixed signal and a phase of the second mixed signal.
13. The measuring device according to claim 12, wherein the evaluation device is adapted to determine the distance between the measuring device and the at least one object as a function of the difference between the phase of the first mixed signal and the phase of the second mixed signal.
14. The measuring device according to claim 12, wherein the evaluation device is adapted to determine the speed difference between the measuring device and the at least one object as a function of the difference between the phase of the first mixed signal and the phase of the second mixed signal.
15. A method for at least one of (a) measuring a distance between an emission device and at least one object and (b) measuring a speed difference between the emission device and the at least one object, comprising:
sending a transmission signal by the emission device including at least two signal portion sequences, each of a first signal portion sequence and a second signal portion sequence including at least two temporally alternating signal portions, the at least two signal portions of the first signal portion sequence differing in frequency by a first differential frequency, the at least two signal portions of the second signal portion sequence differing in frequency by a second differential frequency, the first differential frequency of the first signal portion sequence differing from the second differential frequency of the second signal portion sequence.
16. The method according to claim 15, further comprising receiving a reflection signal of the transmission signal reflected by the at least one object.
17. The method according to claim 16, further comprising mixing the first signal portion sequence with a portion of the first signal portion sequence of the reflection signal reflected by the at least one object to form a first mixed signal.
18. The method according to claim 17, further comprising ascertaining a dominating frequency of the first mixed signal.
19. The method according to claim 18, further comprising determining the distance between the emission device and the at least one object as a function of the dominating frequency of the first mixed signal.
20. The method according to claim 18, further comprising determining the speed difference between the emission device and the at least one object as a function of the dominating frequency of the first mixed signal.
21. The method according to claim 16, further comprising:
mixing the second signal portion sequence with a portion of the second signal portion sequence of the reflection signal reflected by the at least one object to form a second mixed signal; and
ascertaining a dominating frequency of the second mixed signal.
22. The method according to claim 21, further comprising determining the distance between the emission device and the at least one object as a function of a dominating frequency of the first mixed signal and the dominating frequency of the second mixed signal.
23. The method according to claim 21, further comprising determining the speed difference between the emission device and the at least one object as a function of a dominating frequency of the first mixed signal and the dominating frequency of the second mixed signal.
24. The method according to claim 21, further comprising determining a difference between a phase of the first mixed signal and a phase of the second mixed signal.
25. The method according to claim 24, further comprising determining the distance between the emission device and the at least one object as a function of the difference between the phase of the first mixed signal and the phase of the second mixed signal.
26. The method according to claim 24, further comprising determining the speed difference between the emission device and the at least one object as a function of the difference between the phase of the first mixed signal and the phase of the second mixed signal.
27. The method according to claim 15, wherein the emission device is arranged in a motor vehicle.
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 first device storing instructions which, when executed, perform a method comprising:
launching a registration process, the launching beginning a predetermined time interval within which the registration process is to be launched on a second device, the first device and the second device each having a registration trigger;
transmitting registration information to the second device;
receiving registration information from the second device;
generating a secret, without knowledge prior to launching the registration process of information associated with the second device, the generation of the secret enabling authenticated communications between the first device and the second device;
transmitting an acknowledgement to the second device;
receiving an acknowledgement from the second device, the receipt of the acknowledgement assuring that the secret is shared with the second device;
monitoring the registration process for registration communications emitting from a third device;
completing the registration process if no registration communications emitting from a third device are detected; and
not completing the registration process if any registration communications from a third device are detected.
2. The first device of claim 1, wherein the method further comprises generating a pseudonym designating at least one of the first device and the second device.
3. The first device of claim 1, wherein the registration information does not include a plain-text identity of at least one of the first device and the second device, thereby making the registration process at least partially hidden.
4. The first device of claim 1, wherein registration information includes PIN number information.
5. The first device of claim 1, wherein the launching of the registration process comprises launching of a registration process on a Wi-Fi network device.
6. The first device of claim 1, wherein the launching of the registration process comprises launching of a registration process on a network device that is at least one of a server, wireless printer, wireless computer, or a network access point.
7. The first device of claim 1, wherein the method further comprises performing encrypted authenticated communications between the first device and the second device.
8. A system, comprising:
a server supporting a first part of a registration process;
a network device supporting a second part of a registration process;
a pair of registration triggers, the server and the network device each supporting one of the pair of registration triggers, wherein activation of the pair of registration triggers within a predetermined time interval launches the first and second parts of the registration processes;
a communications link coupling the server to the network device, the communications link transmitting:
a set of registration data exchanged between the server and the network device after the launching of the first and second parts of the registration process;
a cryptographic secret formed at least one of the server and the network device and shared between the server and the network device, the cryptographic secret being formed by each of the at least one of the server and the network device without knowledge prior to registration of information associated with the other of the at least one of the server and the network device, the formation of the cryptographic secret facilitating authentic communications between the server and the network device; and
a database that stores the registration data and the cryptographic secret; and
a monitoring system that detects a registration signal that might emanate from a third device, whereby detection of any the registration signal from the third device prevents registration of the network device as part of the registration process.
9. The system of claim 8, wherein registration of the network device includes the use of a PIN number.
10. The system of claim 8, further including a step of generating a pseudonym for at least one of the server and the network device.
11. The system of claim 8, wherein the registration data for at least one of the server and the network device does not include a plain-text device identifier, thereby making the registration process at least partially hidden.
12. The system of claim 8, wherein the network device is a Wi-Fi network device.
13. The system of claim 8, wherein the network device is at least one of a wireless printer, wireless computer, or a network access point.
14. A system providing a capability for two network devices to communicate securely, the system comprising:
a trigger associated with each of the two network devices, the trigger associated one of the network devices indicating a desire to launch a registration process between the two network devices when activated on the one network device, the registration process being launched when the trigger associated with the other of the two network devices is activated within a predetermined time interval of the trigger being activated on the one network device;
a communications system associated with each of the two network devices, the communications system associated with each of the network devices transmitting registration information to the other of the two network devices;
a key generator associated with at least one of the two network devices generating a key without pre-registration knowledge of information associated with the other network device, the key enabling an authenticated communications capability between the two network devices, the communications system further transmitting an acknowledgement between the two network devices when the authenticated communications capability between the two network devices is enabled;
a monitoring system that monitors the registration process for registration communications emitting from a third device, the monitoring system allowing completion of the registration process if no registration communications emitting from a third device is detected, and causing the registration process to not be completed if any registration communications from a third device are detected.
15. The system of claim 14, wherein the key generator further enables encrypted authenticated communications between the two network devices.