Quantum Proof-of-Stake (qPoS) is the revolutionary technology behind the Stealth digital currency. It represents a key breakthrough to achieve the “holy grail of crypto”—a feeless, fast, scalable, and private blockchain.
Five-second blocks, spaced at highly regular intervals, enable the quick transactions supported by Stealth. New blocks are added to the blockchain within several milliseconds of their scheduled time. The regularity provides a pleasant user experience thanks to the speed that outdoes most credit card transactions.
Behind the five second blocks is a groundbreaking network timekeeping technology called an asynchronous network clock. To comprehend the challenge being addressed by Stealth’s clock, consider that digital currencies are decentralized and cannot depend on one timekeeping apparatus (clock) to synchronize all computers within the Stealth network. “Synchronize” means “set to the same time.” The absence of a single clock indicates the impossibility of perfectly synchronizing every computer in the network. Cryptos need to embrace that impossibility to function at all. Some digital currencies are designed to permit sloppy timekeeping. For Bitcoin, however, allowing for sloppy timekeeping means block times should be highly irregular and slow, often resulting in frustrating user experiences.
QPoS leverages a system of two clock types: “The first type of clock is a shared network queue. Within each network computer, the queue changes only on blockchain events, advancing to the timestamp of each new block added to the computer’s own blockchain,” Stealth co-founder and lead developer Dr. James Stroud detailed. “The second type of clock is the hardware clock found in each computer. Each computer tries its best to synchronize with a common time, even though perfect synchronization is impossible.”
As network computers produce blocks, these blocks contain scheduled and quite synchronous timestamps from hardware clocks. Blocks with timestamps seemingly out of order based on their relationship with other blockchain events will be disregarded by network computers to ensure that timestamps are adequately synchronous. QPoS network computers only compare network events to other network events, not to the computers’ hardware clocks. Emerging from the system is a shared clock which maintains excellent time without requiring perfect synchronization among computers.
Stealth qPoS is an unrivaled solution to private transactions, thanks to the combination of quick confirmation times and cryptographic anonymity.
The timekeeping system of Stealth integrates with its economic-driven consensus mechanism which delivers privacy via cryptography along with streamlined blockchain execution. It enables the quickest cryptographically private cryptocurrency possible. Stealth solves several existing concerns regarding slow confirmation times in other blockchain techs, particularly privacy coins.
Stealth R&D is hosting a presentation on QPoS technology at the Consensus conference in New York.