Subscription-Based Decryption Key Distribution for Broadcast Positioning
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Solution Overview
Problem
Existing methods for broadcasting positioning information in LTE networks lack efficiency, leading to increased latency and decreased capacity, particularly due to the insecure sharing of sensitive information and inefficient access control.
Innovation Solution
A method where a first network node determines and provides decryption keys to wireless devices based on their subscription type, allowing them to decrypt encrypted positioning information broadcasted by a second network node, ensuring secure access and efficient data handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If positioning information is broadcasted without encryption, then network capacity and latency are improved, but security is worsened due to insecure sharing of sensitive information
Solution Approach 1:
The broadcast information is segmented into multiple parts: unencrypted metadata that can be accessed by all devices, and encrypted positioning data that requires specific decryption keys. This allows the network to broadcast comprehensive information while maintaining security through selective encryption of sensitive portions.
Solution Approach 2:
Different encryption keys are assigned to different subsets of positioning information based on subscription types. Each wireless device receives decryption capabilities appropriate to its specific subscription level, allowing efficient access control without encrypting the entire broadcast stream, thus maintaining network capacity while protecting sensitive data.
2Reliability
If encryption keys are provided to all wireless devices, then security is improved, but device complexity and network overhead are worsened
Solution Approach 1:
Instead of providing uniform encryption keys to all devices, the system implements differentiated key distribution where each wireless device receives decryption keys tailored to its subscription type. This reduces the complexity burden on individual devices while maintaining comprehensive security across the network.
Solution Approach 2:
The system dynamically adapts the encryption and key distribution based on the wireless device's subscription type. The first network node determines appropriate decryption keys by considering the device's capabilities and subscription level, allowing flexible security management without fixed complex access control structures.
3Adaptability or versatility
If multiple encryption keys are used for different subscription types, then access control is improved, but system complexity is worsened
Solution Approach 1:
The system applies different encryption levels and keys to different subsets of positioning information based on subscription types. Each subscription tier accesses appropriately encrypted data subsets, providing fine-grained access control without requiring the entire system to manage all possible encryption schemes simultaneously.
Solution Approach 2:
The first network node pre-determines which decryption keys to provide to each wireless device based on its subscription type before the device attempts to access positioning information. This preliminary key assignment simplifies the overall system complexity by establishing access rights in advance rather than managing complex real-time authentication for multiple encryption schemes.
Data Source
AI summary
A method for handling broadcast information is described. A first network node (111) operating in a wireless communications network (100) determines (403) one or more decryption keys (K1, K2, K3) to be provided to a wireless device (131) in the wireless communications network (100). The decryption keys enable the wireless device (131) to decrypt information to be broadcasted by a second network node (112) in the wireless communications network (100). The information comprises a plurality of subsets of positioning information. Each of the subsets is to be, or is, encrypted with a different encryption key based on a respective type of subscription for wireless devices (131, 132, 133) in the wireless communications network (100). The determined decryption keys are based on at least one type of subscription of the wireless device (131). The first network node (111) then initiates (404) providing the determined to the wireless device (131).