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US 8,284,939 B2Granted
Systems and methods for preventing transmitted cryptographic parameters from compromising privacy
AssigneeNeology, Inc.
InventorsThomas Tahan, Jun Liu
Life of this patent
Estimating the term…
Abstract
A method for secure cryptographic communication comprises transmitting information that identifies a group key from a first device to a second device. The method further comprises, in the first device, using the group key to encrypt an input vector, transmitting the encrypted input vector, encrypting privacy-sensitive information using a device key, an encryption algorithm, and the input vector, and transmitting the encrypted privacy-sensitive information to the second device.
Claims21
A method for secure cryptographic communication, comprising:
- transmitting information that can be used to reference a group key from a first device to a second device;
- in the first device, using the group key to encrypt an input vector;
- in the first device, transmitting the encrypted input vector;
- in the first device, encrypting privacy-sensitive information using a device key, an encryption algorithm, and the input vector;
- and
- in the first device, transmitting the encrypted privacy-sensitive information to the second device,
- wherein the group key is referenced by a tuple comprising privacy-insensitive information, and wherein the privacy-insensitive information includes information related to an issuing authority and an expiration date.
4 more elements
An RFID device, comprising:
- an antenna;
- a memory configured to store information including a group key, information that can be used to reference the group key, an input vector, a device key and privacy-sensitive information;
- and
- a processor coupled with the memory and the antenna, the processor configured to:
- transmit the information that can be used to reference the group key stored in the memory via the antenna,
- use the group key to encrypt an input vector,
- transmit the encrypted input vector via the antenna,
- encrypt the privacy-sensitive information stored in the memory using the device key, an encryption algorithm, and the input vector, and
- transmit the encrypted privacy-sensitive information,
- wherein the group key is referenced by a tuple comprising privacy-insensitive information, and wherein the privacy-insensitive information comprises information related to an issuing authority and an expiration date.
7 more elements
A communication system, comprising:
- a first device comprising:
- an antenna;
- a memory configured to store information including a group key, information that can be used to reference the group key, an input vector, a device key and privacy-sensitive information, and
- a processor coupled with the memory and the antenna, the processor configured to:
- transmit the information that can be used to reference the group key stored in the memory via the antenna, wherein the group key is referenced by a tuple comprising privacy-insensitive information, and wherein the privacy-insensitive information comprises information related to an issuing authority and an expiration date,
- use the group key to encrypt an input vector,
- transmit the encrypted input vector via the antenna,
- encrypt the privacy-sensitive information stored in the memory using the device key, an encryption algorithm, and the input vector, and
- transmit the encrypted privacy-sensitive information;
- and
- a second device comprising:
- an antenna, and
- a processor coupled with the antenna, the processor configured to receive the information that can be used to reference the group key via the antenna;
- use the received information to reference the group key;
- receive the encrypted input vector via the antenna;
- receive the encrypted privacy-sensitive information via the antenna;
- use the referenced group key to decrypt the input vector;
- and
- use the decrypted input vector and the encryption algorithm to decrypt the privacy-sensitive information.
16 more elements
Dependencies are inferred from the claim text.