Blockchain Ledger for Tamper-Evident Call Recording
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current call recording systems are vulnerable to tampering and deletion of recorded content by privileged users, leaving no trace of the incident.
Innovation Solution
Implementing a blockchain-based distributed ledger system to record conference call metadata, ensuring that multiple copies of the blockchain are stored across networks, making it difficult to alter or delete the recorded information without consensus from the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a centralized database is used to store call recording metadata, then the system is easy to manage and access, but the system becomes vulnerable to tampering and deletion by privileged users
Solution Approach 1:
The centralized database is segmented into a distributed network of nodes, where each node holds a copy of the blockchain ledger. This segmentation eliminates the single point of control that allows privileged users to tamper with data, while maintaining ease of access through the distributed network architecture.
Solution Approach 2:
A blockchain intermediary layer is introduced between the call recording system and the storage mechanism. This blockchain acts as a trusted mediator that records all metadata transactions immutably, preventing direct tampering by privileged users while allowing legitimate access through consensus-based validation.
2Device complexity
If metadata is stored in a centralized location, then access control is simple, but the system allows unauthorized alterations without trace
Solution Approach 1:
The metadata information is copied and distributed across multiple nodes in the network, each maintaining an identical copy of the blockchain ledger. This copying mechanism ensures that no single node can alter data without detection, as changes would need to be propagated to all nodes simultaneously, which is prevented by cryptographic hashing and consensus protocols.
Solution Approach 2:
Cryptographic hash functions are applied preliminarily to the metadata before storage, creating a digital fingerprint that verifies data integrity. This preliminary action ensures that any subsequent alteration of the metadata would result in a mismatched hash, making tampering immediately detectable across the distributed network.
3Productivity
If privileged access is granted to administrators, then system management is efficient, but the system becomes susceptible to insider threats
Solution Approach 1:
The blockchain system implements continuous feedback through cryptographic verification at every transaction step. Even privileged users must have their actions validated by the network's consensus mechanism, providing immediate feedback that prevents unauthorized alterations. This feedback loop maintains management efficiency by allowing legitimate operations while blocking malicious ones.
Solution Approach 2:
The system uses self-service cryptographic validation where each node independently verifies the authenticity and integrity of metadata transactions without requiring trust in privileged users. This self-service mechanism eliminates insider threat risks by making the system's security independent of individual user integrity, while maintaining efficient processing through parallel validation.
Data Source
AI summary
A conference call is recorded. For example, a voice conference call between a group of users is recorded. Information about the recording of the conference call is identified. For example, a date, a time, a length, an agenda, and a list of participants are identified for the conference call. A block is added to a blockchain with the information about the recording of the conference call. The blockchain with the information about the recording of the conference call is sent to a distributed ledger. The distributed ledger is where copies of the blockchain are stored on multiple nodes on one or more networks. By having multiple copies distributed in one or more networks, it is much more difficult to remove all the information that the conference call actually took place.