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Home » Proof of History Explained: The Backbone of Solana’s Blockchain Success

Proof of History Explained: The Backbone of Solana’s Blockchain Success

Hania by Hania
August 26, 2024
in Beginner Guides
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Proof of History Explained: The Backbone of Solana’s Blockchain Success
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Proof of History (PoH) is a groundbreaking cryptographic innovation primarily associated with the Solana blockchain. While often mistaken for a consensus mechanism, PoH is more accurately described as a cryptographic time-keeping tool that plays a crucial role in the Solana network’s efficiency and speed. This article delves into the mechanics of Proof of History and explores how it has enabled Solana to become one of the fastest and most cost-effective blockchains in the crypto ecosystem.

The Need for Proof of History: Enhancing Blockchain Throughput

In decentralized networks, time verification and node communication consume significant computational resources. Anatoly Yakovenko, co-founder of Solana, envisioned a decentralized network that could rival the performance of a single node, but achieving this required overcoming the inefficiencies of traditional time-stamping methods.

For example, networks like Hedera Hashgraph rely on a process where every message is signed and timestamped by a majority of nodes, which is then propagated across the entire network. While this method ensures fairness, it introduces considerable delays, slowing down the overall process.

Yakovenko’s innovation, Proof of History, addresses these challenges by enabling validators to rely on encoded timestamps, significantly optimizing the system. PoH is not a consensus mechanism but rather a cryptographic clock that orders events and transactions, reducing the overhead and latency typically associated with transaction ordering in distributed networks.

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Proof of History Explained: The Backbone of Solana’s Blockchain Success

How Proof of History Works: The Mechanics Behind Solana’s Speed

Proof of History allows a distributed network to agree on time without requiring prior communication or consensus among nodes. Each validator on the Solana network maintains its own clock by encoding the passage of time using a Sequential-Hashing Verifiable Delay Function (VDF) based on the SHA-256 algorithm.

SHA-256 is a secure hashing algorithm that produces a fixed-size hash value, regardless of the input. This algorithm’s output is pre-image resistant, meaning it cannot easily be reverse-engineered to determine the input.

In the context of PoH, this algorithm is used to create a sequence of hashes, where each hash is derived from the previous one. This process takes a measurable amount of time to compute, forming a historical record that validators can use to verify the sequence and timing of events. When a new transaction is submitted, it references the most recent hash, which validators confirm into the sequence, ensuring that the transaction occurred at a specific point in time.

By eliminating the need for consensus on time and sequence, Solana can schedule leaders who take turns validating the network. This verifiable order of events allows Solana to achieve high throughput and low latency, making it a powerful and efficient blockchain.

Also Read: Solana ETF Faces Major Setback as SEC Delays Approval and Sparks Security Debate

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Hania

Hania

Hania is a 30-year-old blogger who used to be a teacher before entering the world of writing. She is originally from India and has been writing blogs on various topics for 2 years now. Hania is particularly interested in exploring the intersections of finance, technology, and cryptocurrency. Her experience as a teacher has given her unique insights into the ways in which digital media can be used to facilitate learning and engagement. Through her writing, Hania hopes to share her knowledge and learning of crypto industry with everyone.

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