1. A system for securely transmitting an output data having metadata to an output device, comprising:
a client device; and
a server having a server public key, the server operatively interposed between the client device and the output device on a network;
wherein the client device generates a random symmetric session key and encrypts the output data using the random symmetric session key, the client device encrypts the random symmetric session key using an asymmetric user public key, the client device encrypts the encrypted random symmetric session key and the metadata using the server public key, and the client device sends the encrypted output data, the first double-encrypted random symmetric session key and the encrypted metadata to the server.
2. The system of claim 1, wherein the client device generates an output job by combining the encrypted metadata, the first double-encrypted random symmetric session key and the encrypted output data.
3. The system of claim 1, wherein the server decrypts the metadata using a server private key.
4. The system of claim 3, wherein the server sends the decrypted metadata to a job tracking software.
5. The system of claim 1, wherein the server encrypts the metadata using an output device public key prior to transmitting the metadata to the output device.
6. The system of claim 1, wherein the server generates a second double-encrypted random session key by encrypting the encrypted random symmetric session key using an output device public key prior to transmitting the second double-encrypted random symmetric session key to the output device.
7. The system of claim 6, wherein the output device generates the encrypted random symmetric session key by decrypting the second double-encrypted random symmetric session key using an output device private key.
8. The system of claim 7, wherein the output device decrypts the encrypted random symmetric session key using the asymmetric user private key.
9. The system of claim 8, wherein a third cryptographic module uses the decrypted random symmetric session key to decrypt the encrypted output data.
10. A method, comprising:
receiving, by a client device, an output data;
encrypting, by a client device, the output data with a randomly-generated symmetric session key;
generating, by a client device, a session key header by encrypting the randomly-generated symmetric session key using an asymmetric user public key; and
encrypting, by a client device, using a server public key, the session key header and a metadata associated with the output data, wherein a server decrypts the encrypted session key header and the encrypted metadata using the server private key and wherein the server encrypts the session key header using an output device public key.
11. The method of claim 10, further comprising generating, by the client device, an output job by appending the encrypted session key header and the encrypted metadata to the output data.
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 method of determining the unique identity and physical location of an electronic device, comprising:
a. storing a digital representation of the unique identity in a device memory;
b. transmitting the digital representation of the unique identity through space by controlling the variation in time of the intensity of a light emitting element of the electronic device;
c. measuring, by one or more elements of a sensor system, the variation in time of the intensity of the light emitting element of the electronic device and representing the measured variation as an electrical signal;
d. processing the electrical signal to produce a digital representation of the unique identity;
e. determining the physical location of the identified device by assessing which element or elements of the sensor system produced the electrical signal.
2. The method of claim 1, wherein the variation in time of the intensity of the light emitting element of the electronic device encodes the digital representation of the unique identity as a time sequence of one or more discrete information bits, wherein a bit state corresponds to a defined optical display element intensity range.
3. The method of claim 1, wherein the variation in time of the intensity of the light emitting element of the electronic device encodes the digital representation of the unique identity as a sum of one or more periodic waveforms of different frequencies, wherein the digital representation is represented as a series of discrete information bits, each bit corresponding to a particular waveform frequency range, with a bit state corresponding to the waveform amplitude range.
4. The method of claim 3, wherein the variation in time of the intensity of the light emitting element of the electronic device includes at least one periodic waveform of a defined frequency and amplitude apart from the digital representation.
5. The method of claim 4, wherein the periodic waveform of a defined frequency and amplitude is used as a signal reference value to determine the state of each information bit in the digital representation.
6. The method of claim 3, wherein the information quality of the variation in time of the intensity of the light emitting element is assessed by comparing the sensed waveform frequencies to a set of nominal encoding standard frequencies.
7. The method of claim 3, wherein the information quality of the variation in time of the intensity of the light emitting element is assessed by comparing the sensed waveform amplitudes to a set of nominal encoding standard amplitudes.
8. The method of claim 1, wherein the sensor system is an optical video camera.
9. The method of claim 1, wherein the unique identity of the electronic device is assigned, by means of a data network, by a processor connected to the sensor system.
10. A method of determining the unique identity of an electronic device, comprising:
a. storing a digital representation of the unique identity in a device memory;
b. transmitting the digital representation of the unique identity through space as an electromagnetic wave, wherein the digital information is encoded as a sum of discrete periodic waveforms of different frequencies;
c. converting the electromagnetic wave to a time varying electrical signal by one or more sensors;
d. processing the time varying electrical signal to produce a digital representation of the unique identity.
11. The method of claim 10, wherein the electromagnetic wave includes at least one periodic waveform of a defined frequency and amplitude apart from the digital representation.
12. The method of claim 11, wherein the periodic waveform of a defined frequency and amplitude is used as a signal reference value to determine the state of each information bit in the digital representation.
13. The method of claim 10, wherein the information quality of the time varying electrical signal is assessed by comparing the sensed waveform frequencies to a set of nominal encoding standard frequencies.
14. The method of claim 10, wherein the information quality of the time varying electrical signal is assessed by comparing the sensed waveform amplitudes to a set of nominal encoding standard amplitudes.