Patents by Inventor Phil Libin

Phil Libin 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).

  • Publication number: 20120308981
    Abstract: A computer learning system includes a computer screen, a cover that selectively covers and reveals different amounts of the computer screen and a computer processor that senses an amount of the computer screen that is revealed by the cover. The processor causes a first learning segment to be displayed on the computer screen in response to the cover revealing a first portion of the computer screen and causes a second learning segment to be displayed on the computer screen in response to the cover revealing a second portion of the computer screen. The first learning segment may be a question and the second learning segment may be an answer to the question. The computer processor and the computer screen may be provided by a tablet computer. The table computer may be an iPad® 2 tablet computer.
    Type: Application
    Filed: May 15, 2012
    Publication date: December 6, 2012
    Inventors: Phil LIBIN, Andrew Sinkov
  • Patent number: 8327149
    Abstract: Indicating data currentness includes, on any date of a sequence of dates, issuing a proof indicating the currentness status of the data during a particular time interval. The proof may be a digital signature. The time interval may be in the form of a current date and an amount of time. The proof may include a digital signature of the time interval. The proof may include a digital signature of the time interval and the data. The proof may include a digital signature of the time interval and a compact form of the data, such as a hash. Indicating data currentness may also include distributing the proofs to a plurality of unsecure units that respond to requests by users for the proofs. Indicating data currentness may also include gathering a plurality of separate pieces of data and providing a single proof for the separate pieces of data. The data may be electronic documents.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: December 4, 2012
    Assignee: CoreStreet, Ltd.
    Inventors: Silvio Micali, Phil Libin, Brandon Volbright
  • Publication number: 20120274444
    Abstract: A system and method are disclosed for controlling physical access through a digital certificate validation process that works with standard certificate formats and that enables a certifying authority (CA) to prove the validity status of each certificate C at any time interval (e.g., every day, hour, or minute) starting with C's issue date, D1. C's time granularity may be specified within the certificate itself, unless it is the same for all certificates. For example, all certificates may have a one-day granularity with each certificate expires 365 days after issuance. Given certain initial inputs provided by the CA, a one-way hash function is utilized to compute values of a specified byte size that are included on the digital certificate and to compute other values that are kept secret and used in the validation process.
    Type: Application
    Filed: February 17, 2012
    Publication date: November 1, 2012
    Inventors: Silvio Micali, David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov
  • Patent number: 8261319
    Abstract: Logging events associated with accessing an area includes recording an event associated with accessing the area to provide an event recording and authenticating at least the event recording to provide an authenticated recording. Recording an event may include recording a time of the event. Recording an event may include recording a type of event. The event may be an attempt to access the area. Recording an event may include recording credentials/proofs used in connection with the attempt to access the area. Recording an event may include recording a result of the attempt. Recording an event may include recording the existence of data other than the credentials/proofs indicating that access should be denied. Recording an event may include recording additional data related to the area. Authenticating the recording may include digitally signing the recording.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: September 4, 2012
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali, David Engberg
  • Publication number: 20120210137
    Abstract: A cost-effective system that provides for the efficient protection of transmitted non-public attribute information may be used, for example, to control access to a secure area. Encryption of the attribute information may be performed using symmetric encryption techniques, such as XOR and/or stream cipher encryption. A centralized database that stores and transmits the encrypted attribute information may generate the encryption/decryption key based on selected information bytes, for example, as taken from a card inserted into a handheld device used at the secure area. The selected information to generate the encryption key stream may be varied on a periodic basis by the centralized database. Information as to which selected bytes are to be used for a particular access authorization request may be transmitted to the handheld unit or may be input through action of a user of the handheld unit, for example by entry of a PIN code.
    Type: Application
    Filed: December 13, 2011
    Publication date: August 16, 2012
    Inventors: Phil LIBIN, David Engberg
  • Publication number: 20120191728
    Abstract: A system is provided for presenting users with relevant personalized and/or customized information whenever a visitor visits a website or performs an Internet search. The described system described herein advantageously provides for the saving (clipping) of website information as an integrated part of a visitor's browsing experience. The user may be presented with either a suggested list of notebooks and/or a suggested list of tags for the website informationa. The content of the website information that is clipped may be advantageously controlled by a website owner/publisher. Using website clips, identified as “notes,” previously stored by a visitor, currently displayed website content may be accordingly modified in connection with identified relevant notes and/or a notification may be displayed on the current website for a particular visitor identifying stored relevant notes of the visitor.
    Type: Application
    Filed: February 17, 2012
    Publication date: July 26, 2012
    Inventors: Phil LIBIN, Phil Constantinou, Dmitry Stavisky, Alex Pachikov, Pavel Skaldin, Andrew Sinkov, Jakob Bignert
  • Patent number: 8171524
    Abstract: A system and method are disclosed for controlling physical access through a digital certificate validation process that works with standard certificate formats and that enables a certifying authority (CA) to prove the validity status of each certificate C at any time interval (e.g., every day, hour, or minute) starting with C's issue date, D1. C's time granularity may be specified within the certificate itself, unless it is the same for all certificates. For example, all certificates may have a one-day granularity with each certificate expires 365 days after issuance. Given certain initial inputs provided by the CA, a one-way hash function is utilized to compute values of a specified byte size that are included on the digital certificate and to compute other values that are kept secret and used in the validation process.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: May 1, 2012
    Assignee: Corestreet, Ltd.
    Inventors: Silvio Micali, David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov
  • Publication number: 20120059811
    Abstract: A system is provided for presenting users with relevant personalized and/or customized information whenever a visitor visits a website or performs an internet search. The described system described herein advantageously provides for the saving (clipping) of website information as an integrated part of a visitor's browsing experience. The content of the website information that is clipped may be advantageously controlled by a website owner/publisher. Using website clips, identified as “notes,” previously stored by a visitor, currently displayed website content may be accordingly modified in connection with identified relevant notes and/or a notification may be displayed on the current website for a particular visitor identifying stored relevant notes of the visitor.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 8, 2012
    Inventors: Phil Libin, Phil Constantinou, Dmitry Stavisky, Alex Pachikov, Pavel Skaldin, Andrew Sinkov
  • Publication number: 20120060098
    Abstract: A system is provided for presenting users with relevant personalized and/or customized information whenever a visitor visits a website or performs an internet search. The described system described herein advantageously provides for the saving (clipping) of website information as an integrated part of a visitor's browsing experience. The content of the website information that is clipped may be advantageously controlled by a website owner/publisher. Using website clips, identified as “notes,” previously stored by a visitor, currently displayed website content may be accordingly modified in connection with identified relevant notes and/or a notification may be displayed on the current website for a particular visitor identifying stored relevant notes of the visitor.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 8, 2012
    Inventors: Phil LIBIN, Phil Constantinou, Dmitry Stavisky, Alex Pachikov, Pavel Skaldin, Andrew Sinkov
  • Patent number: 8099603
    Abstract: A cost-effective system that provides for the efficient protection of transmitted non-public attribute information may be used, for example, to control access to a secure area. Encryption of the attribute information may be performed using symmetric encryption techniques, such as XOR and/or stream cipher encryption. A centralized database that stores and transmits the encrypted attribute information may generate the encryption/decryption key based on selected information bytes, for example, as taken from a card inserted into a handheld device used at the secure area. The selected information to generate the encryption key stream may be varied on a periodic basis by the centralized database. Information as to which selected bytes are to be used for a particular access authorization request may be transmitted to the handheld unit or may be input through action of a user of the handheld unit, for example by entry of a PIN code.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: January 17, 2012
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, David Engberg
  • Patent number: 8015597
    Abstract: Issuing and disseminating a data about a credential includes having an entity issue authenticated data indicating that the credential has been revoked, causing the authenticated data to be stored in a first card of a first user, utilizing the first card for transferring the authenticated data to a first door, having the first door store information about the authenticated data, and having the first door rely on information about the authenticated data to deny access to the credential. The authenticated data may be authenticated by a digital signature and the first door may verify the digital signature. The digital signature may be a public-key digital signature. The public key for the digital signature may be associated with the credential. The digital signature may be a private-key digital signature. The credential and the first card may both belong to the first user.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: September 6, 2011
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali, David Engberg, Alex Sinelnikov
  • Patent number: 7966487
    Abstract: Facilitating a transaction between a first party and a second party includes, prior to initiating the transaction, one of the parties obtaining an artificially pre-computed OCSP response about a specific digital certificate, where the artificially pre-computed OCSP response is generated by an entity other than the first party and the second party, one of the parties initiating the transaction, in connection with the transaction, the first party providing the specific digital certificate to the second party, and the second party verifying the specific digital certificate using the artificially pre-computed OCSP response. The second party may obtain the artificially pre-computed OCSP response prior to the transaction being initiated. The second party may cache the artificially pre-computed OCSP response for future transactions. The first party may obtain the artificially pre-computed OCSP response prior to the transaction being initiated.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: June 21, 2011
    Assignee: CoreStreet, Ltd.
    Inventors: David Engberg, Phil Libin, Silvio Micali
  • Patent number: 7822989
    Abstract: Controlling access includes providing a barrier to access that includes a controller that selectively allows access, at least one administration entity generating credentials/proofs, wherein no valid proofs are determinable given only the credentials and values for expired proofs, the controller receiving the credentials/proofs, the controller determining if access is presently authorized, and, if access is presently authorized, the controller allowing access. The credentials/proofs may be in one part or may be in separate parts. There may be a first administration entity that generates the credentials and other administration entities that generate proofs. The first administration entity may also generate proofs or the first administration entity may not generate proofs. The credentials may correspond to a digital certificate that includes a final value that is a result of applying a one way function to a first one of the proofs.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: October 26, 2010
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali, David Engberg
  • Publication number: 20100268956
    Abstract: Indicating data currentness includes, on any date of a sequence of dates, issuing a proof indicating the currentness status of the data during a particular time interval. The proof may be a digital signature. The time interval may be in the form of a current date and an amount of time. The proof may include a digital signature of the time interval. The proof may include a digital signature of the time interval and the data. The proof may include a digital signature of the time interval and a compact form of the data, such as a hash. Indicating data currentness may also include distributing the proofs to a plurality of unsecure units that respond to requests by users for the proofs. Indicating data currentness may also include gathering a plurality of separate pieces of data and providing a single proof for the separate pieces of data. The data may be electronic documents.
    Type: Application
    Filed: January 27, 2010
    Publication date: October 21, 2010
    Inventors: Silvio Micali, Phil Libin, Brandon Volbright
  • Patent number: 7716486
    Abstract: An entity controlling access of a plurality of users to at least one disconnected door includes mapping the plurality of users to a group, for each time interval d of a sequence of dates, having an authority produce a digital signature indicating that members of the group can access door during time interval d, causing at least one of the members of the group to receive the digital signature during time interval d for presentation to the door in order to pass therethrough, having the at least one member of the group present the digital signature to the door D, and having the door open after verifying that (i) the digital signature is a digital signature of the authority indicating that members of the group can access the door at time interval d, and (ii) that the current time is within time interval d.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: May 11, 2010
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali, David Engberg
  • Patent number: 7660994
    Abstract: An administration entity controls access to an electronic device by generating credentials and a plurality of corresponding proofs, wherein no valid proofs are determinable given only the credentials and values for expired proofs. The electronic device receives the credentials and, if access is authorized at a particular time, the electronic device receives a proof corresponding to the particular time and confirms the proof using the credentials. A single administration entity may generate the credentials and generate the proofs and/or there may be a first administration entity that generates the credentials and other administration entities that generate proofs. The credentials may be a digital certificate that includes a final value that is a result of applying a one way function to a first one of the proofs.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: February 9, 2010
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali
  • Patent number: 7657751
    Abstract: Indicating data currentness includes, on any date of a sequence of dates, issuing a proof indicating the currentness status of the data during a particular time interval. The proof may be a digital signature. The time interval may be in the form of a current date and an amount of time. The proof may include a digital signature of the time interval. The proof may include a digital signature of the time interval and the data. The proof may include a digital signature of the time interval and a compact form of the data, such as a hash. Indicating data currentness may also include distributing the proofs to a plurality of unsecure units that respond to requests by users for the proofs. Indicating data currentness may also include gathering a plurality of separate pieces of data and providing a single proof for the separate pieces of data. The data may be electronic documents.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: February 2, 2010
    Assignee: CoreStreet, Ltd.
    Inventors: Silvio Micali, Phil Libin, Brandon Volbright
  • Patent number: 7616091
    Abstract: Actuating a security system includes providing a first set of access codes to a wireless device and causing the wireless device to transmit the first set of access codes to a first controller that actuates the security system. The first set of access codes provided to the wireless device may expire. Actuating a security system may also include providing expiration dates for each of the first set of access codes provided to the wireless device. Actuating a security system may also include examining each of the expiration dates and, in response to a particular expiration date being prior to a current date, erasing from the wireless device a particular one of the first set of access codes that corresponds to the particular expiration date.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: November 10, 2009
    Assignee: CoreStreet, Ltd.
    Inventor: Phil Libin
  • Patent number: 7600129
    Abstract: Determining access includes determining if particular credentials/proofs indicate that access is allowed, determining if there is additional data associated with the credentials/proofs, wherein the additional data is separate from the credentials/proofs, and, if the particular credentials/proofs indicate that access is allowed and if there is additional data associated with the particular credentials/proofs, then deciding whether to deny access according to information provided by the additional data. The credentials/proofs may be in one part or in separate parts. There may be a first administration entity that generates the credentials and other administration entities that generate proofs. The first administration entity may also generate proofs or may not generate proofs. The credentials may correspond to a digital certificate that includes a final value that is a result of applying a one way function to a first one of the proofs.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: October 6, 2009
    Assignee: CoreStreet, Ltd.
    Inventors: Phil Libin, Silvio Micali, David Engberg, Alex Sinelnikov
  • Publication number: 20080211624
    Abstract: A system and method are disclosed for controlling physical access through a digital certificate validation process that works with standard certificate formats and that enables a certifying authority (CA) to prove the validity status of each certificate C at any time interval (e.g., every day, hour, or minute) starting with C's issue date, D1. C's time granularity may be specified within the certificate itself, unless it is the same for all certificates. For example, all certificates may have a one-day granularity with each certificate expires 365 days after issuance. Given certain initial inputs provided by the CA, a one-way hash function is utilized to compute values of a specified byte size that are included on the digital certificate and to compute other values that are kept secret and used in the validation process.
    Type: Application
    Filed: February 8, 2008
    Publication date: September 4, 2008
    Inventors: Silvio Micali, David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov