Patents by Inventor David Chaum

David Chaum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11403903
    Abstract: A method allows a random sample of a large population of voters to cast votes and for both the unpredictability/un-manipulability of the sample selection and the integrity of the tally to be verified by any interested parties using public information. The problem of vote selling is addressed. Also, a variant allows voters to remain substantially anonymous.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: August 2, 2022
    Assignee: Digital Community LLC
    Inventor: David Chaum
  • Publication number: 20220163806
    Abstract: An eyeglass device includes an eyeglass frame having a pair of side arms and a pair of optics. A camera and one or more speakers are supported by the eyeglass frame. A touch sensor is supported by the eyeglass frame for at least controlling volume of the one or more speakers.
    Type: Application
    Filed: January 26, 2022
    Publication date: May 26, 2022
    Inventor: David CHAUM
  • Publication number: 20220076253
    Abstract: A cryptographic protocol is provided that allows principals to securely realize a wide range of financial products simply via the protocol conducted between their respective phone apps. No other entities need play a role and no fees need be paid. A commitment fee is required to prevent the counterparty being spoofed and the system being discredited. If a party reneges during a transaction, that party is refunded their value and at least a share of a penalty levied on the reneging party.
    Type: Application
    Filed: August 10, 2021
    Publication date: March 10, 2022
    Inventor: David CHAUM
  • Publication number: 20220078172
    Abstract: Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised. None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operations - - - resulting it is believed in orders of magnitude performance improvement over previously-known systems. Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases.
    Type: Application
    Filed: November 19, 2021
    Publication date: March 10, 2022
    Inventor: David CHAUM
  • Publication number: 20220027912
    Abstract: A value transfer system with physical tokens including indicia hiding means and indica substantially hidden by the hiding means and the hiding being substantially removable is improved by providing a plurality of regions with substantially removable hiding means, with the hiding means substantially hiding respective indicia. The indicia information is substantially unpredictable. As part of the system, a first party provides digitally to at least a second party first transaction information at least including a provenience signature ensemble, with the signature ensemble including at least indication of the regions with hiding removed.
    Type: Application
    Filed: July 21, 2021
    Publication date: January 27, 2022
    Inventor: David CHAUM
  • Patent number: 11184338
    Abstract: Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised. None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operations—resulting it is believed in orders of magnitude performance improvement over previously-known systems. Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: November 23, 2021
    Inventor: David Chaum
  • Patent number: 10536670
    Abstract: Disclosed are systems and methods for providing video content while inhibiting the copying of that content for later viewing. Video images may be made difficult to copy for presentation at later times by the omission or addition of content developed in relation to the particular initial viewing. For instance, video information may be customized by omitting information that is not likely to be substantially perceived by the initial viewer but that is substantially likely to be perceived as missing by at least some other viewers.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: January 14, 2020
    Inventor: David Chaum
  • Publication number: 20190297062
    Abstract: Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised. None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operations—resulting it is believed in orders of magnitude performance improvement over previously-known systems. Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases.
    Type: Application
    Filed: June 13, 2019
    Publication date: September 26, 2019
    Inventor: David CHAUM
  • Patent number: 10375042
    Abstract: Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised. None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operations—resulting it is believed in orders of magnitude performance improvement over previously-known systems. Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: August 6, 2019
    Inventor: David Chaum
  • Publication number: 20190005756
    Abstract: A method allows a random sample of a large population of voters to cast votes and for both the unpredictability/un-manipulability of the sample selection and the integrity of the tally to be verified by any interested parties using public information. The problem of vote selling is addressed. Also, a variant allows voters to remain substantially anonymous.
    Type: Application
    Filed: August 14, 2018
    Publication date: January 3, 2019
    Inventor: David CHAUM
  • Patent number: 10050786
    Abstract: A method allows a random sample of a large population of voters to cast votes and for both the unpredictability/un-manipulability of the sample selection and the integrity of the tally to be verified by any interested parties using public information. The problem of vote selling is addressed. Also, a variant allows voters to remain substantially anonymous.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: August 14, 2018
    Inventor: David Chaum
  • Publication number: 20180139190
    Abstract: Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised. None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operations—resulting it is believed in orders of magnitude performance improvement over previously-known systems. Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases.
    Type: Application
    Filed: March 14, 2016
    Publication date: May 17, 2018
    Inventor: DAVID Chaum
  • Publication number: 20170200338
    Abstract: A method allows a random sample of a large population of voters to cast votes and for both the unpredictability/un-manipulability of the sample selection and the integrity of the tally to be verified by any interested parties using public information. The problem of vote selling is addressed. Also, a variant allows voters to remain substantially anonymous.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 13, 2017
    Inventor: David CHAUM
  • Publication number: 20150277123
    Abstract: A near-to-eye display system includes a source of modulated light, a proximal optic positionable adjacent an eye of the user to receive the modulated light. The proximal optic has a plurality of groups of optically redirecting regions. The optically redirecting regions are configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye. A first group of the optically redirecting regions receives modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a first portion of the retina. A second group of the optically redirecting regions receives modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a second portion of the retina.
    Type: Application
    Filed: February 3, 2015
    Publication date: October 1, 2015
    Inventors: David CHAUM, Thomas W. Mossberg, John R. Rogers
  • Publication number: 20140172517
    Abstract: A novel method allows a random sample of a large population of voters to cast votes and for both the unpredictability/un-manipulability of the sample selection and the integrity of the tally to be verified by any interested parties using public information. The problem of vote selling is addressed. Also, a variant allows voters to remain substantially anonymous.
    Type: Application
    Filed: June 18, 2012
    Publication date: June 19, 2014
    Inventor: David Chaum
  • Publication number: 20120132713
    Abstract: A paper ballot voting system is described that allows voters to verify that their ballots are correctly counted and provide substantiating evidence if they are not. The systems work whether or not automation is available in the polling place. In other aspects special pens and printing provide protection of voter privacy and against marks being added after ballots are cast. Further aspects of the approach include robust ballot scanning and improved transparency of the voter check-in process.
    Type: Application
    Filed: February 7, 2012
    Publication date: May 31, 2012
    Inventor: David CHAUM
  • Patent number: 8162215
    Abstract: A paper-ballot voting system is disclosed in which voters can retain symbols printed adjacent to the particular candidates or ballot question positions that they mark. Including ballot serial numbers on the forms allows voters to check online the symbols recorded for their ballots while maintaining ballot secrecy. In case of dispute, a physical resolution procedure lets voters establish whether the recorded symbols are correct with respect to the actual physical ballots. Some examples allow forms to be obtained online and voted by physical or facsimile delivery. Voters who cannot read ballots or cannot mark ballots can nevertheless vote while maintaining ballot secrecy. The overall integrity of the outcome is provided transparently.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: April 24, 2012
    Inventor: David Chaum
  • Patent number: 8123114
    Abstract: An improved paper ballot voting system allows voters to verify that their ballots are correctly counted and provide substantiating evidence if they are not. Codes are revealed to voters by the act of marking the ballot during voting and voters can check that these codes are posted. If these codes are not posted as marked, voters can make the codes they obtained public. These codes made public by voters can be compared against codes that were cryptographically committed to in advance of the election. If the codes from voters do in fact match codes committed to, evidence of incorrectness of the vote tallying is provided.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: February 28, 2012
    Inventor: David Chaum
  • Publication number: 20100149073
    Abstract: A near-to-eye display system for forming an image as an illuminated region on a retina of at least one eye of a user is disclosed. The system includes a source of modulated light, a proximal optic positionable adjacent an eye of the user to receive the modulated light. The proximal optic has a plurality of groups of optically redirecting regions. The optically redirecting regions are configured to direct a plurality of beams of the modulated light into a pupil of the eye to form a contiguous illuminated portion of the retina of the eye. A first group of the optically redirecting regions is configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a first portion of the retina. A second group of the optically redirecting regions is configured to receive modulated light from the source and redirect beams of the modulated light into the pupil of the eye for illumination of a second portion of the retina.
    Type: Application
    Filed: October 14, 2009
    Publication date: June 17, 2010
    Inventors: David Chaum, Thomas W. Mossberg, John R. Rogers
  • Publication number: 20100110368
    Abstract: The present invention relates to a personal multimedia electronic device, and more particularly to a head-worn device such as an eyeglass frame having a plurality of interactive electrical/optical components. In one embodiment, a personal multimedia electronic device includes an eyeglass frame having a side arm and an optic frame; an output device for delivering an output to the wearer; an input device for obtaining an input; and a processor comprising a set of programming instructions for controlling the input device and the output device. The output device is supported by the eyeglass frame and is selected from the group consisting of a speaker, a bone conduction transmitter, an image projector, and a tactile actuator. The input device is supported by the eyeglass frame and is selected from the group consisting of an audio sensor, a tactile sensor, a bone conduction sensor, an image sensor, a body sensor, an environmental sensor, a global positioning system receiver, and an eye tracker.
    Type: Application
    Filed: October 7, 2009
    Publication date: May 6, 2010
    Inventor: David Chaum