 Method of simulating a room and/or sound impression |
| OF THE PREFERRED EMBODIMENTS FIG. 1a of the drawing shows a possible method of determining the ... |
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| Acoustic display system and method for ultrasonic imaging |
| The invention provides an ultrasonic imaging system with a three-dimensional acoustic display. In ... |
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| Panel-form microphones |
| What is claimed is: 1. A panel-form microphone for operation in a predetermined frequency range, ... |
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| Audio system for a computer display |
| OF THE INVENTION Referring to the drawing there is shown an essentially rectangular screen S of an ... |
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| Apparatus and method for adjusting audio equipment in acoustic environments |
| The foregoing objects are achieved by this invention in which the signal in each channel of a ... |
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| Method for the authentication of data |
| It is an aim of the invention to increase the possibilities of the method of authentication so that ... |
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| Stereo signal communication system and method |
| OF SPECIFIC EMBODIMENTS Referring to the specific embodiment shown in the drawings, and without ... |
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| Method and apparatus for encryption |
| The above-discussed and other drawbacks and deficiencies of the prior art are overcome or ... |
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| 4-Channel surround sound generator |
| It is, therefore, an object of the invention to provide a four-channel surround-sound generator ... |
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| Linear speaker array |
| As used herein, the term "sound delivery" is not limited to any specific application. Although the ... |
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Enhanced cryptographic system and method with key escrow feature
| Details |
Inventors: Sudia, Frank Wells;
Assignee: Certco LLC (New York, NY)
Primary Examiner: Barron, Jr.; Gilberto
Assistant Examiner:
Attorney, Agent or Firm: Steptoe & Johnson LLP
The invention provides a cryptographic system and method with a key escrow feature that uses a method for verifiably splitting users' private encryption keys into components and for sending those components to trusted agents chosen by the particular users, and provides a system that uses modern public key certificate management, enforced by a chip device that also self-certifies. The methods for key escrow and receiving an escrow certificate are also applied herein to a more generalized case of registering a trusted device with a trusted third party and receiving authorization from that party enabling the device to communicate with other trusted devices. Further preferred embodiments provide for rekeying and upgrading of device firmware using a certificate system, and encryption of stream-oriented data. |
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DETAILED DESCRIPTION It is one object of this invention to provide a commercial key escrow system that uses published algorithms, operates in a manner that inspires the users' trust and confidence, and solves the problems posed by national security and law enforcement demands.
It is another object of this invention to provide a commercial key escrow system that uses private keys that may be changed by the user at will or at regular intervals.
It is a further object of this invention to provide a commercial key escrow system that allows the user to choose the key escrow agents to safeguard his private key or the separate pieces of his private key.
It is still a further object of this invention provide a commercial key escrow system that contains safeguards against unrestricted government access, yet allows access by the employers of the users or by the countries of which the foreign users are citizens.
It is yet another object of this invention to provide a commercial key escrow system that offers an alternative to the U.
S.
Government's proposed Clipper chip system.
These and other objects of the invention are accomplished in accordance with the principles of the invention by providing a cryptographic key escrow system that uses a method, such as the Micali "Fair" escrow method, for verifiably splitting users' private encryption keys into components and for sending those components to trusted agents chosen by the particular users, and by providing a system that uses modern public key certificate management, enforced by a chip device that also self-certifies.
In a preferred embodiment of this invention, the new chip encrypts or decrypts only if certain conditions are met, namely, (1) if a valid "sender certificate" and a valid "recipient certificate" are input, where "valid" means that the particular user's private decryption key is provably escrowed with a specified number of escrow agents and that the master escrow center is registered and certified by the chip manufacturer, and (2) if a valid Message Control Header is generated by the sender and validated by the recipient, thereby giving authorized investigators sufficient information with which to request and obtain the escrowed keys
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Audio Signal Processing 
