Sensor-Based Secret Key Generation with Temporal Accumulation
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Solution Overview
Problem
Existing techniques for generating secret information using sensed data face challenges in ensuring sufficient randomness due to differences in sensor readings among multiple apparatuses, leading to difficulties in obtaining the same secret information.
Innovation Solution
An information processing apparatus and method that includes a sensor data obtaining unit and a key generation unit, which use sensor data over a predetermined period to generate key information for authentication, adjusting for sensor performance variations by determining effective data and calculating progress information to ensure consistent randomness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If sensed information is used as randomness for secret information generation, then secret information can be generated autonomously, but sufficient randomness cannot be obtained due to sensor performance variations
Solution Approach 1:
The patent changes the parameter of data collection from instantaneous to temporal accumulation. By collecting sensor data over a predetermined period and combining multiple data points, the system transforms insufficient individual readings into sufficient randomness through temporal parameter modification.
Solution Approach 2:
The patent merges multiple sensor readings taken at different time points within a predetermined period into a single secret information generation process. This combination of multiple data points compensates for individual sensor variations and accumulates sufficient randomness.
2Manufacturing precision
If sensed information is analyzed to obtain similar information between apparatuses, then the same secret information can be generated, but the randomness is reduced
Solution Approach 1:
The patent performs preliminary actions of collecting and accumulating sensor data over a predetermined period before secret information generation. This preliminary data accumulation ensures sufficient randomness is gathered while maintaining the ability to generate consistent secret information through the defined time-bound collection process.
3Reliability
If sensor data is collected over a predetermined period, then sufficient randomness can be obtained, but time consumption increases
Solution Approach 1:
The patent implements periodic action by defining a predetermined period for sensor data collection. This structured time-bound approach balances randomness accumulation with time efficiency, collecting data at regular intervals within the specified period rather than continuously or instantaneously.
4Manufacturing precision
If multiple sensor readings are combined to compensate for sensor differences, then consistent secret information can be generated, but device complexity increases
Solution Approach 1:
The patent applies self-service by using the information processing apparatus itself to collect, accumulate, and process its own sensor data for secret information generation. The system autonomously handles the complexity of combining multiple readings without requiring external intervention or complex external processing systems.
Data Source
AI summary
Provided is an information processing apparatus including a sensor data obtaining unit configured to obtain predetermined information from a sensor, the sensor obtaining the predetermined information by sensing, and a key generation unit configured to generate key information for use in an authentication process, based on the information which is obtained by the sensor data obtaining unit during a predetermined period of time.