Space PoET Consensus Using Relativity for Satellite Security
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Solution Overview
Problem
Existing Proof-of-Elapsed-Time (PoET) consensus mechanisms, such as those used in satellite networks, rely on technological guarantees that can be broken, lacking a fundamental physical security basis.
Innovation Solution
The proposed Space Proof-of-Elapsed-Time (Space PoET) consensus method leverages the theory of special relativity to ensure a minimum elapsed time for information transmission between satellites, using a sequence of hops over known and irreducible distances, thereby securing decentralized ledgers worldwide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Proof-of-Elapsed-Time (PoET) consensus mechanisms use technological guarantees for time measurement, then consensus validation can be achieved, but the security foundation is weak and can be broken
Solution Approach 1:
The patent replaces technological/mechanical time measurement systems with a fundamental physical law-based system. Instead of relying on complex technological guarantees for time measurement, the invention uses the finite speed of light as an immutable physical constant to establish minimum elapsed time between satellite hops, providing an unbreakable security foundation based on physics rather than technology
Solution Approach 2:
The patent changes the basis of time measurement from technological parameters (which can be manipulated or broken) to a fundamental physical parameter (speed of light) that is immutable. By using the speed of light as the reference parameter, the system achieves reliable time measurement that cannot be compromised by technological failures or attacks
2Area of stationary object
If satellites communicate directly over long distances, then network coverage is improved, but transmission latency increases due to finite speed of light
Solution Approach 1:
The patent incorporates the inherent transmission latency caused by the finite speed of light as a useful feature rather than a drawback. By designing the consensus mechanism to require a minimum number of hops between satellites, the system ensures that a minimum elapsed time passes during transaction validation, turning the physical limitation into a security advantage that prevents manipulation while maintaining wide network coverage
3Reliability
If a minimum number of hops is required for transaction validation, then elapsed time is guaranteed by physics, but validation process becomes more complex
Solution Approach 1:
The patent makes the validation process self-verifying through the use of digital signatures at each hop. Each satellite automatically signs the transaction data it relays, creating an immutable chain of custody that proves the minimum number of hops was completed. This self-service approach eliminates the need for complex external verification mechanisms while ensuring reliability through the physical law of light speed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Space PoET provides a secure and energy-efficient consensus mechanism by guaranteeing a minimum elapsed time based on the finite speed of light, ensuring the integrity of decentralized networks and preventing manipulation of random seeds.
Implementation Method 1
limited by the finite speed of light in a vacuum as stated by the theory of special relativity
Implementation Method 2
the theory of special relativity
Implementation Method 3
speeds of satellites, relative to the ground and with respect to each other, further results in shifts in frequencies of electromagnetic waves used for communications, known as the Doppler effect
Data Source
AI summary
Proof-of-Work (PoW) is the most secure consensus mechanism to validate transaction data in public blockchains. However, there is an ever-growing criticism about the high energy demand of PoW-based cryptocurrencies. Bitcoin alone consumes (at the time of writing) roughly 2.5 times as much energy as Switzerland just to secure its network. Therefore, low energy-consuming consensus methods are required and preferred, and many recent cryptocurrencies now implement Proof-of-Stake (POS) as an alternative. However, PoS has some drawbacks as well, one of them being the requirement to immobilize coins for staking, and cannot be not as secure as PoW. An interesting and promising alternative is Proof-of-Elapsed-Time (PoET), relying on the random sleep/wake times of processing units. However, this is not totally satisfactory in its current incarnation, because it relies on protected areas of computing chips: this is only a technological protection that can be broken. The invention proposes a variant of PoET, called Space PoET, which uses the fact that no information can travel faster than the speed of light, according to Einstein's Special Theory of Relativity, imposing minimal information transmission delay: this is a fundamental protection. The method is based on transaction validation messages forced to pass through distinct hops to guarantee some elapsed time and security against manipulation of randomness generation. This makes the method ideal for satellite constellations in space, where distances are established by the laws of celestial mechanics.