Abstract:
A method, an apparatus, and a computer program product for generating and processing random numbers are provided. An apparatus comprises a processing system that includes a processor, a random number generator and a pair of buffers. A first buffer receives low-entropy random numbers generated by the random number generator and a second buffer provides high-entropy random numbers directly to a processing system. The processing system may directly access the second buffer in response to an instruction executed by the processing system. The processing system responds to an interrupt based on occupancy levels of the buffers by conditioning low-entropy random numbers read from the first buffer to obtain high-entropy random numbers that are then stored in the second.
Abstract:
A method operational on a receiver device for exchanging and/or generating security keys is provided. A first encrypted master key Km is received at the receiver device from a transmitter device, the first encrypted master key Km secured by a receiver public key Kpub-rx. The first encrypted master key Km may be decrypted with a receiver private key Kpri-rx to obtain the master key Km. The master key Km may be encrypted using a block cipher that applies a receiver secret key Kh to obtain a second encrypted master key.
Abstract:
An example method of asset tracking includes receiving, from each of one or more positioning devices, a corresponding position identification (ID) value, determining a tier value associated with each received position ID value, determining asset position information based on each received position ID value and each determined tier value, and transmitting the determined asset position information to a receiver.
Abstract:
Various operations may be performed based on a distance-related function associated with two or more devices. For example, an association procedure for two or more devices may be based on one or more determined distances. Similarly, presence management may be based on one or more determined distances. A distance-related function may take various form including, for example, a distance between devices, two or more distances between devices, a rate of change in a relative distance between devices, relative acceleration between devices, or some combination of two or more of the these distance-related functions.
Abstract:
A method of obtaining information for locating an asset includes: listening, at an asset tag, for a first listen duration for landmark messages; receiving, at the asset tag during the first listen duration, at least one landmark message from each of one or more landmark tags; selecting a synched landmark tag from the one or more landmark tags; abstaining from listening, at the asset tag, for landmark messages until approximately a subsequent transmission time of a synched landmark message corresponding to the synched landmark tag; and waking up at approximately the subsequent transmission time of the synched landmark message to listen, at the asset tag, for landmark messages for a second listen duration such that the asset tag listens for the landmark messages during the subsequent transmission time; wherein the first listen duration is longer than the second listen duration.
Abstract:
A method, an apparatus, and a computer program product for generating and processing random numbers are provided. An apparatus comprises a processing system that includes a processor, a random number generator and a pair of buffers. A first buffer receives low-entropy random numbers generated by the random number generator and a second buffer provides high-entropy random numbers directly to a processing system. The processing system may directly access the second buffer in response to an instruction executed by the processing system. The processing system responds to an interrupt based on occupancy levels of the buffers by conditioning low-entropy random numbers read from the first buffer to obtain high-entropy random numbers that are then stored in the second.
Abstract:
Various operations may be performed based on a distance-related function associated with two or more devices. For example, an association procedure for two or more devices may be based on one or more determined distances. Similarly, presence management may be based on one or more determined distances. A distance-related function may take various form including, for example, a distance between devices, two or more distances between devices, a rate of change in a relative distance between devices, relative acceleration between devices, or some combination of two or more of the these distance-related functions.
Abstract:
A method operational on a receiver device for exchanging and/or generating security keys is provided. A first encrypted master key Km is received at the receiver device from a transmitter device, the first encrypted master key Km secured by a receiver public key Kpub-rx. The first encrypted master key Km may be decrypted with a receiver private key Kpri-rx to obtain the master key Km. The master key Km may be encrypted using a block cipher that applies a receiver secret key Kh to obtain a second encrypted master key.
Abstract:
A small form-factor security device is provided that may be inserted in series with a telephone line to encrypt dual tone multi-frequency (DTMF) tones from a telephone to prevent unauthorized disclosure of sensitive information. A receiving device decrypts the encrypted DTMF tones to receive the original information sent by the telephone. The security device acts as a second factor in a two-factor authentication scheme with a tele-services security server that authenticates the security device.
Abstract:
Embodiments disclosed allow authentication between two entities having agreed on the use of a common modulus N. The authentication includes generating a pseudorandom string value; generating a public key value based on the modulus N and the pseudorandom string value; generating a private key value corresponding to the public key value; receiving a verifier's public key value; generating a shared secret value based on the modulus N, the private key value and the verifier's public key value; calculating an authentication signature value using the shared secret value; and transmitting the authentication signature value for authentication. When the authentication signature is received, the public key value and the shared value are generated to calculate an authentication signature value. Thereafter, the authentication signature values are compared and authenticated.