Proof of History

Solana

2026-08-21 00:39:47

Researchers disclose Solana PoH clock attack ahead of Alpenglow mainnet activation

Researchers from USENIX Security have publicly disclosed a clock attack against Solana’s Proof of History, according to CryptoSlate, saying the issue had already been privately reported to the Solana development team in December 2025. The paper describes how a malicious scheduled leader could use a “re-anchoring” technique to slow the advance of PoH logical time, giving itself a longer transaction selection window within the same span of physical time. The researchers also said the attack could use TowerBFT’s fork-choice mechanism to isolate blocks produced by honest leaders, while requiring less than 33% stake. The issue was not reviewed in Anza’s 50,000 SOL Alpenglow security competition, which closed on Aug. 19, because the rules excluded behavior that can only be triggered before Alpenglow is activated. Solana developers said they are aware of the behavior, consider the most severe scenario unlikely under current conditions, and expect the Alpenglow upgrade to remove the core preconditions for the attack. Alpenglow code is already included in the Agave 4.2 client but has not yet been activated on mainnet, with activation expected alongside Agave 4.3.

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Solana

2026-07-08 12:08:12

Solana's Proof of History: How the 'Distributed Clock' Achieves Speed and Efficiency

This article explains Solana's Proof of History (PoH) consensus mechanism, which uses Verifiable Delay Functions for cryptographic timestamps. It covers PoH's working principle, pros (high throughput, scalability, low energy) and cons (centralization risk, complexity), and compares it with PoW and PoS.

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Proof of Hist

2026-07-08 12:08:12

Solana’s Proof of History: The Revolutionary Clock That Unlocks Blockchain Speed

An in-depth look at Solana’s Proof of History (PoH) consensus mechanism—how Verifiable Delay Functions create tamper-proof timestamps, its advantages over PoW/PoS, and its role in scaling high-throughput blockchain applications.

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Solana

2026-07-08 12:06:19

Solana's Killer Feature: How Proof of History Boosts Blockchain Efficiency

Proof of History (PoH) is Solana's innovative consensus mechanism that uses Verifiable Delay Functions to create immutable timestamps, enabling high throughput, low latency, and energy efficiency. Explore how it works, its pros and cons, and how it compares to Proof of Work and Proof of Stake.

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Proof of Hist

2026-07-08 12:04:15

Proof of History (PoH): Solana's Innovative Time-Stamping Consensus Explained

Proof of History (PoH) is Solana's novel consensus mechanism that uses Verifiable Delay Functions (VDFs) to create immutable timestamps, enabling high throughput, scalability, and energy efficiency. This article explores how PoH works, its pros and cons, and comparisons with Proof of Work and Proof of Stake.

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Solana

2026-05-29 12:00:11

How to Buy Solana (SOL) in the US: Complete Guide and Investment Insights

This comprehensive guide explains how to buy Solana (SOL) in the United States, covering everything from the basics of Solana’s high-performance blockchain to detailed step-by-step purchase instructions. Solana, known for its Proof-of-History consensus and over 50,000 TPS capacity, powers a growing ecosystem of dApps and NFTs. We explore why investors might consider SOL — including its scalability, low fees, and upcoming upgrades like Alpenglow — and outline the process of buying through a regulated exchange like Crypto.com. The guide walks through account creation, identity verification, depositing funds via bank transfer or card, and placing trades with one-time, recurring, limit, or TWAP orders. Additionally, we evaluate SOL’s strengths (speed, low costs, innovation) and weaknesses (network outages, centralization concerns, ecosystem maturity) and offer practical tips on storage, regulatory awareness, and portfolio diversification. Whether you’re a beginner or an experienced trader, this resource provides the knowledge needed to make informed decisions in the dynamic Solana market.

630

Bitcoin

2026-05-29 12:00:11

Bitcoin vs. Solana: A Deep Dive into Digital Gold and the Global Computer

Bitcoin is the first decentralized cryptocurrency, capping its supply at 21 million and using Proof of Work to establish digital gold status focused on secure value storage. Solana, launched in 2020, prioritizes pure performance with a hybrid Proof of History and Proof of Stake consensus, handling thousands of transactions per second at near-zero fees and powering a vibrant ecosystem of dApps, DeFi, and NFTs. This article examines their fundamental differences across transaction speed, fees, scalability, consensus models, programmability, tokenomics, security, and decentralization. It also includes historical price comparisons and answers common questions, helping readers understand the distinct roles these two blue-chip assets play in a diversified portfolio.

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