SkyPirl Blockchain
  • SkyPirl (Pirl)
    • Docs.Pirl.io
    • About SkyPirl (Pirl)
    • Mission
    • Create SkyPirl 2.0 wallet
    • Restore wallet with secret 12 phrase
    • How to be a Nominator
    • SkyPirl coin specifications
    • Run a validator
    • How to unbound fund
    • How payout works
    • How to vote for Council
    • How to set identity
    • SLASHES
    • Refund of slashed
    • COIN SPECIFICATION
    • Governance and Treasury
    • Telemetry
    • List of wallet addresses not working
    • Spend from the treasury and Burn
    • Mint coins and transfer coins to the treasury
      • Treasury2
    • Burn2
    • Source Code
    • List of wallets holding coins of burned wallets with PIRL balance at block 3939000
  • About SkyPirl (Pirl)
  • Mission
  • PIRLmeet.com
    • About PIRLmeet.com
    • Free Trial
    • CINEMA
    • Microphone On-Off
    • Screen Sharing
      • Share—or don't share your audio
      • Video recording tutorial + camera + mp4 video download
    • Hands Up
    • Change the ringtone when giving a raise of hand
    • Stream MP4 videos
    • Stream mp4 video on Firefox browser
    • Cabinet Lock
      • Cabinet Lock account
      • Normal-Demo
      • How can I cabinet lock and keep strangers from entering the room?
      • How can I add people to the room when the room is locked?
    • Text chat
      • Room chat
      • Cabinetlock Chat
      • private chat per video
    • Connect Pirl wallet to Room-House
    • Change cover photo
    • Video title name
    • Setting up you own Room-House
    • How to download videos on youtube, Facebook and convert to mp4 files
    • Use camera beautification App when livestream
    • PIRLmeet can create meetings that last 24/7 and 365 days a year.
    • How does PIRLmeet secure products?
    • Get Pirl coin when playing videos on Room-house
    • Picture
    • OBS Studio
      • Download
      • Screen sharing and front camera
      • Stream video from R-H to Youtube
      • Stream games
      • Stream Video and Record Video and download videos
      • Good quality video settings
      • Edit the frame and choose the recording frame
    • Source Code
  • Game
    • Room-House.com and games
    • Slot Machine
      • Connect the slot machine to the SkyPirl Light Wallet.
      • Connect Room-House.com to the slot machine
  • SkyPirl Light Wallet
  • PIRL Decentralized Charity Foundation
  • SkyPirl Community
  • Apps for Android and IOS (PWA)
    • Android
    • Iphone (IOS)
    • Computer-Windows-PC
  • Business Paradigm R-H
    • Use SkyPirl coin to pay in Room-House.com
  • Roadmap
  • Core Team
  • xTer . Technology
    • About xTER SafeContainer
    • xTer Ecosystem
    • xTer SkyPirl
    • xTer Room-House
      • How to Room-House
    • xTer Room-House Plus
      • How to xTer room-House plus
    • xTer TrueAD
    • xTer SmartFilter
  • White Paper
  • Blog
    • News
      • ------What is Web 1.0, 2.0, 3.0?------
      • The world's first decentralized audio chat room Room-House
      • What's so special about decentralized audio chat rooms?
      • Features that make Room-House.com decentralized chat rooms competitive with giants
      • Ever heard of Decentralized Charity Fund?
      • What is online meeting? 4 most effective online conferencing solutions
      • What is online meeting? Is it easy or difficult to organize?
      • What is the standard of a professional online meeting room?
      • History of the world's first online meeting software
      • Decentralized Application Room-House.com (Daap)
      • In what year was the internet born? And the birth of the project SkyPirl
      • Cooperation between Room-House and Russian State Social University
      • Building SkyPirl Decentralized Internet in Space
      • Data collection is a huge industry that operates in the dark
      • Free and easy decentralized internet for everyone to use
      • What is Pirl (PIRL) ? Community Based Project Pioneering in Introducing Masternode Technology
      • PirlGuard — Innovative Solution against 51% Attacks
      • ETC and PirlGuard Cybersecurity Plan
      • PirlChat messenger release
      • Overview of PirlChat 0.5.1–0.6 Beta Versions
      • Decentralized blockchain messengers
      • PirlChat messenger version 1.0.4 released
      • What is Pirl 2.0 and what changes will come to the Pirl network
      • The Pirl project announced the launch of its own exchange
      • PIRL’s Content Masternodes Are Almost Out: What You Need to Know
      • PIRL Masternodes and DApps Overview
      • PIRL Decentralized Charity Foundation - SkyPirl
      • Thanks to PirlGuard, Callisto is protected against 51% attacks
      • What is SkyPirl(PIRL) project?
      • Here is the sci-fi story of the decentralized social network PIRL:
      • What is Callisto-Pirl.com project?
      • Here is the legend of the multi-planetary decentralized internet space station PIRL:
      • PIRL decentralized social network has the following key differences:
      • The SM feature of the decentralized social network PIRL seems to be an interesting secret.
      • SkyPirl(PIRL) is designed to attract investors with attractive features:
      • SkyPirl project does not sell ICO (Initial Coin Offering) or not raise funds for the following reaso
      • Merry Christmas and a Happy New Year! SkyPirl Callisto-Pirl.com
      • SkyPirl Project Merry Christmas Story:
      • Happy New Year! SkyPirl Callisto-Pirl.com
      • Here's the story of the SkyPirl Mars Exploration Project:
      • Multiplanetary Billionaire
      • Lost in space
      • The Last Space Train
      • The future of society: Polarization of rich and poor in the 4.0 revolution
      • Callisto-Pirl.com Civil War
      • Callisto-Pirl.com Civil War 2
      • Callisto-Pirl.com Civil War 3
      • Callisto-Pirl.com Civil War 4
      • Callisto-Pirl.com Civil War 5
      • Callisto-Pirl.com Civil War 6
      • Callisto-Pirl.com Civil War 7
      • Callisto-Pirl.com Civil War 8
      • Callisto-Pirl.com Civil War 9
      • Callisto-Pirl.com Civil War 10
      • Callisto-Pirl.com Civil War 11
      • Callisto-Pirl.com Civil War 12
      • Page 6
      • Page 5
      • Page 4
      • Page 3
      • Page 2
      • Page 1
      • Page
    • Technical
      • What is Bitcoin? How are Bitcoins created?
      • Export Your Private Key from Third-Party Wallets
      • What Is a Stablecoin?
      • What Is Wrapped Bitcoin?
      • 7 Ways to Generate Passive Income With Crypto
      • What is a decentralized social network?
      • How many Bitcoins can be mined in a day?
      • How many Bitcoins are there in the world?
      • What is a decentralized exchange? different from centralized floor?
      • What is Staking? 5 things to note when investing in Staking
      • What Are Blockchain Bridges?
      • Compare Hot Wallet and Cold Wallet, which one should you use?
      • What is NFT?
      • Building a Decentralized Internet in Space
      • Web 3.0 Paradox
      • Controversy about the future of the Internet
      • The metaverse virtual universe could revolutionize the Internet
      • 'Blockchain is the most influential technology since the Internet'
      • Web3 - Expectations for the Decentralized Internet
      • What is Dapp? The concept of Dapp and their classification
      • How Decentralized Web Browsers Give You Unsurpassed Privacy
      • Is Web 3.0 being hyped?
      • What are Nodes? Types of Nodes in Blockchain
      • Blockchain can be hacked or not?
      • What is Private Key and Public Key in Bitcoin?
      • What is a Nonce in Blockchain?
      • What is Decentralized Autonomous Cooperative (DAC)?
      • What is Genesis Block?
      • What is Web3? Explaining the Decentralized Internet of the Future
      • Z-Consensus CLO
      • DEX223 Explanation
      • CLOIP
        • CLOIP-1
        • CLOIP-2
        • CLOIP-3
        • CLOIP-4
      • Skuld Hard Fork: Transforming Callisto Network with Dynamic Monetary Policy
      • Dex223 ICO
      • CoinSavi là gì?
      • SLOFI Token
    • Pi NetWork
      • Pi NetWork ( English )
        • Pi Network (PI) Mining Step by Step Guide
        • How to Create a Pi Wallet
        • How to KYC Pi Network 100% Success (2023)
        • Pi Network Security Circle: How to Add Users to Security Circle?
        • How to Migrate Your Mining Pi Coin to Mainnet in 8 Steps (See Video)
        • Why Pi Network can become the most active existence of mobile smart cryptocurrency?
        • FAQ? (FAQ)
      • Pi NetWork ( Tiếng Việt)
        • Pi NetWork là gì?
        • Cách KYC Pi Network 100% thành công (2023)
        • Vòng tròn bảo mật là gì?
        • Hướng dẫn tạo ví Pi Network
        • Cách Đào Pi Trên Điện Thoại
        • Cài đặt tên như thế nào là đúng trong Pi Network
        • Bạn cần xác nhận ngay VÍ PI THẬT để chuẩn bị chuyển SỐ PI XỊN vào ví pi sau khi hoàn thành KYC.
        • Hướng dẫn cách rút chuyển Pi về Ví Mainnet
        • Cách tăng tốc độ Đào Pi Network
        • Tại sao Pi Network có thể trở thành sự tồn tại tích cực nhất của tiền điện tử thông minh di động?
        • Hỏi đáp (FAQ)
    • Việt Nam
      • Pirl (PIRL) Là Gì ? Dự Án Dựa Trên Cộng Đồng Đi Tiên Phong Trong Việc Giới Thiệu Công Nghệ Masternod
      • Giới thiệu về SkyPirl (Pirl)
      • Sứ Mệnh Pirl2.0
      • Phần mềm Room-House.com là gì
      • Giới thiệu về Room-House.com
      • Room-House có thể tạo các cuộc họp kéo dài 24/7 và 365 ngày một năm.
      • Room-House.com bảo mật sản phẩm như thế nào?
      • Giới thiệu về xTER SafeContainer
      • Kế hoạch an ninh mạng của ETC và PirlGuard
      • Quỹ từ thiện phi tập trung Pirl
      • Phát hành trình nhắn tin PirlChat
      • Tổng quan về các phiên bản Beta của PirlChat 0.5.1–0.6
      • Trình nhắn tin chuỗi khối phi tập trung
      • PirlChat messenger phiên bản 1.0.4 được phát hành
      • Pirl 2.0 là gì và những thay đổi nào sẽ đến với mạng Pirl
      • Dự án Pirl đã công bố ra mắt sàn giao dịch của riêng mình
      • Masternode nội dung của PIRL sắp hết: Những điều bạn cần biết
      • Tổng quan về PIRL Masternodes và DApps
      • Xây dựng Internet phi tập trung SkyPirl trong không gian
      • Nhờ PirlGuard, Callisto được bảo vệ chống lại các cuộc tấn công 51%
    • Russia
      • ------Что такое Web 1.0, 2.0, 3.0?------
      • Первый в мире децентрализованный аудиочат Room-House
      • Что такого особенного в децентрализованных аудиочатах?
      • Функции, которые делают децентрализованные чаты Room-House.com конкурентоспособными с гигантами
      • Вы когда-нибудь слышали о Децентрализованном благотворительном фонде?
      • Что такое онлайн-встреча? 4 самых эффективных решения для онлайн-конференций
      • Что такое онлайн-встреча? Легко или сложно это организовать?
      • Каков стандарт профессионального онлайн-зала для встреч?
      • История первого в мире программного обеспечения для онлайн-встреч
      • Децентрализованное приложение Room-House.com (Daap)
      • В каком году родился Интернет? И рождение проекта SkyPirl
      • Сотрудничество Room-House и Российского государственного социального университета
      • Создание децентрализованного Интернета SkyPirl в космосе
      • Сбор данных — это огромная индустрия, которая работает в темноте
      • Бесплатный и простой децентрализованный Интернет, которым может пользоваться каждый.
      • Что такое Пирл (PIRL)? Пионерский проект сообщества по внедрению технологии мастернод
      • PirlGuard — инновационное решение против атак 51%
      • План кибербезопасности ETC и PirlGuard
      • Релиз мессенджера PirlChat
      • Обзор бета-версий PirlChat 0.5.1–0.6
      • Децентрализованные мессенджеры на блокчейне
      • Вышла версия мессенджера PirlChat 1.0.4
      • Что такое Pirl 2.0 и какие изменения произойдут в сети Pirl
      • Проект Pirl объявил о запуске собственной биржи
      • Мастерноды контента PIRL почти закончились: что вам нужно знать
      • Обзор мастернод PIRL и DApps
      • Децентрализованный благотворительный фонд PIRL
      • Благодаря PirlGuard Каллисто защищен от атак 51%
    • China
      • ------什么是Web 1.0、2.0、3.0?------
      • 全球首个去中心化音频聊天室Room-House
      • 去中心化音频聊天室有什么特别之处?
      • 让 Room-House.com 去中心化聊天室与巨头竞争的功能
      • 听说过去中心化慈善基金吗?
      • 什么是线上会议?4种最有效的在线会议解决方案
      • 什么是线上会议?组织起来容易还是困难?
      • 专业的网络会议室的标准是什么?
      • 世界上第一个在线会议软件的历史
      • 去中心化应用室-House.com (Daap)
      • 互联网诞生于哪一年?SkyPirl 项目的诞生
      • Room-House与俄罗斯国立社会大学合作
      • 在太空中构建 SkyPirl 去中心化互联网
      • 数据收集是一个在黑暗中运作的庞大行业
      • 免费且简单的去中心化互联网,供所有人使用
      • 什么是皮尔(PIRL)?基于社区的项目开创了引入主节点技术的先河
      • PirlGuard — 针对 51% 攻击的创新解决方案
      • ETC 和 PirlGuard 网络安全计划
      • PirlChat 即时通讯软件发布
      • PirlChat 0.5.1–0.6 Beta 版本概述
      • 去中心化区块链信使
      • PirlChat 即时通讯软件 1.0.4 版发布
      • 什么是 Pirl 2.0,Pirl 网络将发生哪些变化
      • Pirl项目宣布推出自己的交易所
      • PIRL 的内容主节点即将退出:您需要了解的内容
      • PIRL 主节点和 DApp 概述
      • PIRL 去中心化慈善基金会
      • PirlGuard – 51% 攻击防护
    • Japan
      • -------Web 1.0、2.0、3.0とは何ですか?------
      • 世界初の分散型音声チャットルーム Room-House
      • 分散型音声チャット ルームの何がそんなに特別なのでしょうか?
      • Room-House.com の分散型チャット ルームを大手企業と競争できるようにする機能
      • 分散型慈善基金について聞いたことがありますか?
      • オンライン会議とは何ですか?最も効果的な 4 つのオンライン会議ソリューション
      • オンライン会議とは何ですか?整理するのは簡単ですか、それとも難しいですか?
      • プロフェッショナルなオンライン会議室の基準は何ですか?
      • 世界初のオンライン会議ソフトウェアの歴史
      • 分散型アプリケーション Room-House.com (Daap)
      • インターネットが誕生したのは何年ですか? そしてSkyPirlプロジェクトの誕生
      • SkyPirl 分散型インターネットを宇宙に構築する
      • データ収集は暗闇で行われる巨大産業です
      • 誰もが使える無料で簡単な分散型インターネット
      • ピル(PIRL)とは何ですか?マスターノードテクノロジーの導入における先駆的なコミュニティベースのプロジェクト
      • PirlGuard — 51% 攻撃に対する革新的なソリューション
      • ETC および PirlGuard サイバーセキュリティ プラン
      • PirlChatメッセンジャーのリリース
      • PirlChat 0.5.1 ~ 0.6 ベータ版の概要
      • 分散型ブロックチェーンメッセンジャー
      • PirlChat メッセンジャー バージョン 1.0.4 がリリースされました
      • Pirl 2.0 とは何か、Pirl ネットワークにどのような変更が加えられるか
      • Pirlプロジェクトが独自の取引所の立ち上げを発表
      • PIRL のコンテンツ マスターノードが間もなく終了します: 知っておくべきこと
      • PIRL マスターノードと DApps の概要
      • PIRL 分散型慈善財団
      • PirlGuard のおかげで、Callisto は 51% の攻撃から保護されています
    • Hindi
      • ------वेब 1.0, 2.0, 3.0 क्या है?------
      • Page दुनिया का पहला विकेन्द्रीकृत ऑडियो चैट रूम रूम-हाउस
      • विकेन्द्रीकृत ऑडियो चैट रूम के बारे में क्या खास है?
      • ऐसी विशेषताएँ जो रूम-हाउस.कॉम विकेंद्रीकृत चैट रूम को दिग्गजों के साथ प्रतिस्पर्धी बनाती हैं
      • क्या आपने कभी विकेंद्रीकृत चैरिटी फंड के बारे में सुना है?
      • ऑनलाइन मीटिंग क्या है? 4 सबसे प्रभावी ऑनलाइन कॉन्फ्रेंसिंग समाधान
      • ऑनलाइन मीटिंग क्या है? क्या इसे व्यवस्थित करना आसान है या कठिन?
      • एक पेशेवर ऑनलाइन मीटिंग रूम का मानक क्या है?
      • दुनिया के पहले ऑनलाइन मीटिंग सॉफ़्टवेयर का इतिहास
      • विकेन्द्रीकृत अनुप्रयोग रूम-हाउस.कॉम (डीएएपी)
      • इंटरनेट का जन्म किस वर्ष हुआ था? और प्रोजेक्ट स्काईपिरल का जन्म
      • अंतरिक्ष में स्काईपिरल विकेन्द्रीकृत इंटरनेट का निर्माण
      • डेटा संग्रह एक बहुत बड़ा उद्योग है जो अंधेरे में काम करता है
      • हर किसी के उपयोग के लिए मुफ़्त और आसान विकेन्द्रीकृत इंटरनेट
      • पर्ल (PIRL) क्या है? समुदाय आधारित परियोजना मास्टर्नोड प्रौद्योगिकी के परिचय में अग्रणी है
      • पिरलगार्ड - 51% हमलों के खिलाफ अभिनव समाधान
      • ईटीसी और पिरलगार्ड साइबर सुरक्षा योजना
      • PirlChat मैसेंजर रिलीज़
      • PirlChat 0.5.1–0.6 बीटा संस्करणों का अवलोकन
      • विकेन्द्रीकृत ब्लॉकचेन संदेशवाहक
      • PirlChat मैसेंजर संस्करण 1.0.4 जारी किया गया
      • Pirl 2.0 क्या है और Pirl नेटवर्क में क्या बदलाव आएंगे
      • पर्ल प्रोजेक्ट ने अपने स्वयं के एक्सचेंज के लॉन्च की घोषणा की
      • पीआईआरएल के कंटेंट मास्टरनोड्स लगभग समाप्त हो चुके हैं: आपको क्या जानना चाहिए
      • पीआईआरएल मास्टरनोड्स और डीएपी अवलोकन
      • पीआईआरएल विकेंद्रीकृत चैरिटी फाउंडेशन
      • PirlGuard को धन्यवाद, कैलिस्टो 51% हमलों से सुरक्षित है
    • Charity
      • Децентрализованный благотворительный фонд PIRL
      • PIRL 去中心化慈善基金会
      • PIRL 分散型慈善財団
      • Yayasan Amal Terdesentralisasi PIRL
      • PIRL विकेंद्रीकृत चैरिटी फाउंडेशन
      • Fundación Benéfica Descentralizada PIRL
      • Pirl المؤسسة الخيرية اللامركزية
      • קרן צדקה מבוזרת של PIRL
      • PIRL 분산형 자선 재단
      • PIRL Dezentrale Wohltätigkeitsstiftung
      • Ang mga desentralisadong charity fund Pirl
      • ມູນນິທິການກຸສົນ PIRL Decentralized
      • PIRL Decentralized caritas Foundation
      • มูลนิธิ PIRL Decentralized Charity Foundation
      • PIRL төвлөрсөн бус буяны сан
      • PIRL Weqfa Xêrxwazî ​​ya Nenavendî
      • Fundacja Dobroczynności Zdecentralizowanej PIRL
      • PIRL Gedesentraliseerde Liefdadigheidstigting
      • PIRL Adɔe Fapem a Wɔde Di Dwuma wɔ Decentralized
      • Fondacioni i Decentralizuar i Bamirësisë PIRL
      • PIRL ያልተማከለ የበጎ አድራጎት ድርጅት
      • PIRL ապակենտրոնացված բարեգործական հիմնադրամ
      • PIRL Mərkəzləşdirilməmiş Xeyriyyə Fondu
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  • How a 51% attack works
  • Stealth mining — creating an offspring of the blockchain
  • A race — reversing existing transactions by broadcasting a new chain
  1. Blog
  2. News

PirlGuard — Innovative Solution against 51% Attacks

PreviousWhat is Pirl (PIRL) ? Community Based Project Pioneering in Introducing Masternode TechnologyNextETC and PirlGuard Cybersecurity Plan

Last updated 1 year ago

Pirl block 2,442,442 is a historical event not only for Pirl but for blockchain security in general.

As most of the Pirl community is aware the Pirl Team has been researching different ways to secure our blockchain against both ASICS and 51% attacks for several months, openly within our Discord and behind the scenes. During this time Pirl fell victim to a 51% attack along with many other blockchains.

One of the contributing threat factors that has recently made nearly all PoW consensus mechanism Blockchains susceptible to 51% attacks has been the decline of mining profits leading to excess amounts of cheap hash power.

Most sources available explain the complexity of those attacks and showcase PoS and 3rd party solutions as a good measure for protecting against such attacks. One solution would involve rolling back the blockchain which would still harm the miners, investors, and holders of Pirl. While a PoS consensus mechanism is also vulnerable other kinds of attacks such as “Nothing-At-Stake” attack.

After thorough research and analysis of blockchain security methods the Pirl team did not view any of the currently available options as acceptable long-term preventable measures against these types of attacks. This left the team with the only possible choice available, to develop a new Security Protocol.

In order to understand the PirlGuard Protocol including the how and why behind Pirl developing the innovative solution, you must understand how a 51% attack works. If you are confident in your knowledge regarding the anatomy of a 51% attack feel free to skip to the“How PirlGuard works?” section of this article.

How a 51% attack works

When a Bitcoin owner signs off on a transaction, it is put into a local pool of unconfirmed transactions. Miners select transactions from these pools to form a block of transactions. In order to add this block of transactions to the blockchain, they need to find a solution to a very difficult mathematical problem. They try to find this solution using computational power. This is called hashing. The more computational power a miner has, the better their chances are to find a solution before other miners find theirs. When a miner finds a solution, it will be broadcasted (along with their block) to the other miners and they will only verify it if all transactions inside the block are valid according to the existing record of transactions on the blockchain. Note that even a corrupted miner can never create a transaction for someone else because they would need the digital signature of that person in order to do that (their private key). Sending Bitcoin from someone else’s account is therefore simply impossible without access to the corresponding private key.

Stealth mining — creating an offspring of the blockchain

Now pay attention. A malicious miner can however, try to reverse existing transactions. When a miner finds a solution, it is supposed to be broadcasted to all other miners so that they can verify it whereafter the block is added to the blockchain (the miners reach consensus). However, a corrupt miner can create an offspring of the blockchain by not broadcasting the solutions of his blocks to the rest of the network. There are now two versions of the blockchain.

There are now two versions of the blockchain. The red blockchain can be considered in ‘stealth’ mode.

One version that is being followed by the uncorrupted miners, and one that is being followed by the corrupted miner. The corrupted miner is now working on his own version of that blockchain and is not broadcasting it to the rest of the network. The rest of the network doesn’t pick up on this chain, because after all, it hasn’t been broadcasted. It is isolated to the rest of the network. The corrupted miner can now spend all his Bitcoins on the truthful version of the blockchain, the one that all the other miners are working on. Let’s say he spends it on a Lamborghini for example. On the truthful blockchain, his Bitcoins are now spent. Meanwhile, he does not include these transactions on his isolated version of the blockchain. On his isolated version of the blockchain, he still has those Bitcoins.

A race — reversing existing transactions by broadcasting a new chain

The corrupted miner will now try to add blocks to his isolated blockchain faster than the other miners add blocks to their blockchain (the truthful one). As soon as the corrupted miner creates a longer blockchain, he suddenly broadcasts this version of the blockchain to the rest of the network. The rest of the network will now detect that this (corrupt) version of the blockchain is actually longer than the one they were working on, and the protocol forces them to switch to this chain.

The corrupted blockchain is now considered the truthful blockchain, and all transactions that are not included on this chain will be reversed immediately. The attacker has spent his Bitcoins on a Lamborghini before, but this transaction was not included in his stealth chain, the chain that is now in control, and so he is now once again in control of those Bitcoins. He is able to spend them again.

This is a double-spend attack. It is commonly referred to as a 51% attack because the malicious miner will require more hashing power than the rest of the network combined (thus 51% of the hashing power) in order to add blocks to his version of the blockchain faster, eventually allowing him to build a longer chain.

Now that we know how the attack works we can summarize it in a few key moments.

A) The attacker needs to mine his own version of the blockchain in private with hashrate greater than the one on the main network in order to be faster and create a longer chain. This is often a race for getting a chain with 10–20–50 blocks longer.

B) Once he is in possession of a longer blockchain he needs to broadcast it to the network. Then the network needs to recognize it as the longest chain and accept it.

C) A successful double spend would orphan the initial transactions making the coins available in the attacker wallet once again after the applied longer chain.

How PirlGuard works?

In order to disrupt the mechanics behind 51% attack that allows an attacker to be successful, we have deployed a core solution with a modified consensus algorithm that will defend our blockchain and many others in the near future from virtually all 51% attacks.

PirlGuard System With the PirlGuard Protocol deployed the chances of an attack succeeding are vastly reduced, the protocol is inspired by Horizen penalty system and built for Ethash. As we know once the attacker has created a longer chain through privately mining a separate chain they will then have to broadcast it to the network. Once the attacker opens their node for peering it will attempt to peer with rest of the nodes on the network, telling them that they are wrong. However, once this happens PirlGuard will drop the peer and penalize them by sentencing them to mine X amount of penalty blocks due to their un-peered mining. The amount of penalty blocks assigned depends on the amount of blocks that the malicious miner mined in private.

The PirlGuard security protocol greatly deters attackers from attempting malicious peering giving the main network a much needed boost in security. This new security mechanism reduces the chances to approximately 0.03%.

But, this is not the only security measure we have prepared.

Masternode operated notary contracts on multiple blockchains and monitoring system. The masternodes will take upon a new role altogether with their other utility functions. They will notarize the blockchain and be allowed to act in the processes of penalizing bad actors and preserve honest consensus on the Pirl blockchain.

In case an attacker is still determined to apply a large amount of funds and resources to attempt their luck(0.03% chance), and somehow succeeds to enforce a longer chain onto the network a newly initialized orphan monitoring system will detect the reorganizations of orphaned blocks which will alert the team to take necessary actions and countermeasures.

As additional safety measure the notary contract will be deployed both on Pirl and Ethereum blockchains.

Increasing the amount of required confirmations for exchanges. An additional measure that will be implemented is a higher requirement of block confirmations on exchanges to validate deposits. Another step towards making an attack close to impossible and not even worth an attackers time.

Open Source Pirl has so far contributed to blockchain by developing the first Ethash code based masternode network, the first private IPFS implementation running over a masternode network and is currently working on their own private encrypted blockchain storage solution.

The PirlGuard Security Protocol will be added to our open source library along with the core of the project.

At Pirl we are developing to revolutionize and streamline blockchain technology for the entire blockchain industry. This means our code will be available to anyone to study, educate, test, modify or apply towards their own blockchain network security against future 51% attacks.

Room-House.com SkyPirl Pirl Rumhaus

Source: Author:

Meanwhile, he is still picking up blocks and he verifies them all by himself on his isolated version of the blockchain. This is where all trouble starts… The blockchain is programmed to follow a model of democratic governance, aka the majority. The blockchain does this by always following the longest chain, after all, the majority of the miners add blocks to their version of the blockchain faster than the rest of the network (). This is how the blockchain determines which version of its chain is the truth, and in turn what all balances of wallets are based on. A race has now started. Whoever has the most hashing power will add blocks to their version of the chain faster.

Source Code: Website:

CoinMonks
Jimi.S
so; longest chain = majority
https://git.pirl.io/community/pirl
https://pirl.io/en