Patents by Inventor Michael Muresan

Michael Muresan 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: 6877092
    Abstract: An apparatus, method, and computer program product for achieving interoperability between cryptographic key recovery enabled and unaware systems. The method includes the steps of encrypting data using a cryptography key to generate ciphertext; generating a key recovery block containing key recovery information for the ciphertext; determining whether a receiver for the ciphertext is key recovery unaware; and sending the key recovery block to a key recovery client when it is determined that the receiver is key recovery unaware. In a preferred embodiment, the ciphertext is sent to the receiver only after receiving confirmation from the key recovery client of the receipt of the key recovery block. Also in a preferred embodiment, the key recovery block is sent as part of an Internet Message Control Protocol (ICMP) message.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: April 5, 2005
    Assignee: International Business Machines Corporation
    Inventors: Sekar Chandersekaran, Sohail Malik, Michael Muresan, Narayanan Vasudevan
  • Publication number: 20030076960
    Abstract: An apparatus, method, and computer program product for achieving interoperability between cryptographic key recovery enabled and unaware systems. The method includes the steps of encrypting data using a cryptography key to generate ciphertext; generating a key recovery block containing key recovery information for the ciphertext; determining whether a receiver for the ciphertext is key recovery unaware; and sending the key recovery block to a key recovery client when it is determined that the receiver is key recovery unaware. In a preferred embodiment, the ciphertext is sent to the receiver only after receiving confirmation from the key recovery client of the receipt of the key recovery block. Also in a preferred embodiment, the key recovery block is sent as part of an Internet Message Control Protocol (ICMP) message.
    Type: Application
    Filed: November 4, 2002
    Publication date: April 24, 2003
    Applicant: International Business Machines Corporation
    Inventors: Sekar Chandersekaran, Sohail Malik, Michael Muresan, Narayanan Vasudevan
  • Patent number: 6396929
    Abstract: An apparatus, method, and computer program product for high-availability multi-agent cryptographic key recovery. The present invention defines a key recovery block that specifies allowable subsets of the total set of key recovery agents that can participate in a key recovery. For each subset, key recovery information is computed and stored after the subset is specified. This key recovery information is only useable by that subset because it is computed using that subset of public keys of the agents. When key recovery is initiated, a trusted processor (a key recovery coordinator) validates the contents of the key recovery block and it uses and is allowed to use any of the subsets of the agents to process the key recovery request. Since many subsets could be specified, the likelihood of key recovery failure is greatly diminished.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: May 28, 2002
    Assignee: International Business Machines Corporation
    Inventors: Sekar Chandersekaran, Sohail Malik, Michael Muresan, Narayanan Vasudevan
  • Patent number: 6181795
    Abstract: A method, system, and computer program are disclosed to transport an encrypted key across multiple, diverse systems which provides the relevant and necessary information to guarantee a successful decryption of the key. The method prepares an ASN.1 encoding file at the sender which contains the key. The receiver performs the method to decode the ASN.1 encoded file. In this manner, only the data and the contents of the portable key need to be sent to guarantee successful decryption at the receiver.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: January 30, 2001
    Assignee: International Business Machines Corporation
    Inventors: Sekar Chandersekaran, Narayanan Vasudevan, Sohail Malik, Michael Muresan
  • Patent number: 6061454
    Abstract: A method is disclosed for communicating a key recovery block from a sender to a non-enabled receiver, without the danger of throwing the receiver into an indeterminant state, and without modifying the receiver. The method uses an unmodified communications protocol that has a standard method to receive and acknowledge arbitrary data. The sender sends a message using the standard method for arbitrary data, and includes in the message the key recovery block. The receiver responds with a standard acknowledgment message. The method thereby enables an entity coupled to the link, to monitor the key recovery block, even though the receiver is not enabled to process it.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: May 9, 2000
    Assignee: International Business Machines Corp.
    Inventors: Sohail malik, Michael Muresan