Certicom Corporation

Blackberry Corporation

Isara Corporation

Gallant, Robert P.

Vanstone, Scott A.

Brown, Daniel R.l.

Struik, Marinus

Scott A. Vanstone

Marinus Struik

John A. Proos

Scott Alexander Vanstone

Matthew John Campagna

Robert Philip Gallant

Robert John Lambert

Daniel Richard Brown

Adrian Antipa

Daniel R L Brown

Gustav Michael Gutoski

Daniel Richard L Brown

William Lundy Lattin

Yuri Poeluev

Daniel O'Loughlin

Jay Scott Fuller

Keelan Smith

Thomas Rudolf Stiemerling

Atsushi Yamada

Michael Kenneth Brown

Shane Daniel Kelly

Wei Cheng Joseph Ku

Weicheng Joseph Ku

Joseph Ku

John A Proos

Daniel R Brown

Matthew J Campagna

Robert Gallant

Daniel Rl Brown

William Lattin

Daniel O'loughlin

A method of communicating in a secure communication system, comprises the steps of assembling a message at a sender, then determining a frame type, and including an indication of the frame type in a header of the message. The message is then sent to a recipient and the frame type used to perform a policy check.

Method and apparatus for providing an adaptable security level in an electronic communication

A method of communicating in a secure communication system, comprises the steps of assembling a message at a sender, then determining a security level, and including an indication of the security level in a header of the message. The message is then sent to a recipient.

Method and aparatus for providing an adaptable security level in an electronic communication

A method of transmitting messages from a sender to a recipient over a wireless channel, the messages including a sequence counter and a frame counter. The method comprises establishing initial values of the sequence counter and the frame counter at the sender. Initial values of the frame counter and the sequence counter are provided to the recipient. The sender sends compressed messages including the value of the sequence counter and not the frame counter and monitors for an acknowledgement of receipt by the recipient. When no acknowledgment is received, the sender sends uncompressed messages until an acknowledgement of receipt is received from the recipient. The sequence counter is incremented and the next value of the frame counter is established as the integer next larger than previous value of the frame counter which is congruent to the sequence counter modulo

Method and apparatus for encoding security status information

A method of transmitting messages from a sender to a recipient over a wireless channel, the messages including a sequence counter and a frame counter. The method comprises establishing initial values of the sequence counter and the frame counter at the sender. Initial values of the frame counter and the sequence counter are provided to the recipient. The sender sends compressed messages including the value of the sequence counter and not the frame counter and monitors for an acknowledgement of receipt by the recipient. When no acknowledgment is received, the sender sends uncompressed messages until an acknowledgement of receipt is received from the recipient. The sequence counter is incremented and the next value of the frame counter is established as the integer next larger than previous value of the frame counter which is congruent to the sequence counter modulo 256.

Method and Apparatus for Encoding Security Status Information

Accelerated computation of combinations of group operations in a finite field is provided by arranging for at least one of the operands to have a relatively small bit length. In a elliptic curve group, verification that a value representative of a point R corresponds the sum of two other points uG and vG is obtained by deriving integers w,z of reduced bit length and that v=w/z. The verification equality R=uG+vQ may then be computed as &#x2212;zR+(uz mod n)G+wQ=O with z and w of reduced bit length. This is beneficial in digital signature verification where increased verification can be attained.

Accelerated verification of digital signatures and public keys

In a general aspect, shared secrets for lattice-based cryptographic protocols are generated. In some aspects, a public parameter (a) is obtained, where the public parameter is an array defined for a lattice-based cryptography system. A first secret value (s) and a second secret value (b) are obtained. The first secret value is a second array defined for the lattice-based cryptography system, and is generated based on sampling an error distribution. The second secret value is a third array defined for the lattice-based cryptography system, and is a product of the first and second arrays (b&#x2190;as). A public key ({circumflex over (b)}) is then generated by applying a compression function to the second secret value (b), and the public key is sent to an entity. A shared secret (&#x3bc;) is then generated based on information received from the entity in response to the public key.

Generating shared secrets for lattice-based cryptographic protocols

A method and system for distributed security for a plurality of devices in a communication network, each of the devices being responsible for generating, distributing and controlling its own keys for access to the communication network and using the keys to establish a trusted network, each device's membership to the communication network being checked periodically by other devices by using a challenge response protocol to establish which devices are allowed access to the communication network and the trusted network.

Local area network

In a general aspect, a secret generator is used in an elliptic curve cryptography (ECC) scheme. In some aspects, an elliptic curve subgroup is specified by a public generator of an ECC system, and the secret generator is an element of the elliptic curve subgroup. In some instances, the secret generator is used to generate an ECC key pair that includes a public key and a private key, and the private key is used to generate a digital signature based on a message. In some instances, the public key and the secret generator are used to verify the digital signature.

Using a secret generator in an elliptic curve cryptography (ECC) digital signature scheme

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Toronto, Canada

Marinus Struik