{"id":221,"date":"2023-09-08T19:24:24","date_gmt":"2023-09-08T16:24:24","guid":{"rendered":"https:\/\/noone.io\/blog\/?p=221"},"modified":"2024-03-14T16:13:56","modified_gmt":"2024-03-14T13:13:56","slug":"trust-through-transparency-insight-into-crypto-wallet-security","status":"publish","type":"post","link":"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/","title":{"rendered":"Trust through Transparency: Insight into Crypto Wallet Security"},"content":{"rendered":"\n<p>Due to the occurrence of various hacks targeting DeFi protocols, wallets, and centralized exchanges, the security of digital assets has emerged as a paramount concern for users. While owning private keys is essential, it is not sufficient to ensure the safety of one\u2019s crypto assets, especially considering that the wallet itself stores and utilizes the private key. In this article, we will delve into the principles and approaches we adhere to in the design and development of our&nbsp;<a href=\"https:\/\/noone.io\/blog\/\" target=\"_blank\" rel=\"noreferrer noopener\">white-label wallet solution<\/a>, emphasizing the importance of transparency and understanding for users.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"fe04\"><span class=\"ez-toc-section\" id=\"The_Pervasive_Nature_of_Wallet_Breaches\"><\/span><strong>The Pervasive Nature of Wallet Breaches<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#The_Pervasive_Nature_of_Wallet_Breaches\" >The Pervasive Nature of Wallet Breaches<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Security_Principles_of_Wallet_Development\" >Security Principles of Wallet Development<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Device-Based_Generation_of_Private_Keys\" >Device-Based Generation of Private Keys<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Open_Source_Wallet_Core\" >Open Source Wallet Core<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Interoperability_through_Blockchain_Standards\" >Interoperability through Blockchain Standards<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Genuine_Random_Generation\" >Genuine Random Generation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Industry-Wide_Security_Standards\" >Industry-Wide Security Standards<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Internal_Audits_and_Dependency_Management\" >Internal Audits and Dependency Management<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Secure_Storage_for_Entropy\" >Secure Storage for Entropy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Limited_External_Content\" >Limited External Content<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/noone.io\/blog\/trust-through-transparency-insight-into-crypto-wallet-security\/#Summary\" >Summary<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n\n<p id=\"ed19\">Wallet breaches in the Web3 space have reached alarming proportions. According to a study by&nbsp;<a href=\"https:\/\/www.beosin.com\/resources\/H1_2023_Global_Web3_Security_Report,_AML_Analysis_&amp;_Crypto_Regulatory_Landscape.pdf\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Beosin EagleEye platform<\/a>, intentional attacks resulted in the loss of nearly $0.5 billion worth of crypto assets in the first half of 2023. Wallet and crypto exchange attacks accounted for significant losses, with approximately $78.2 million and $50.1 million, respectively, in H1 2022.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"7680\" height=\"4320\" src=\"https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649.png\" alt=\"Loss amount by project type chart, H1 2023\" class=\"wp-image-226\" style=\"aspect-ratio:16\/9;object-fit:contain\" srcset=\"https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649.png 7680w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-555x312.png 555w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-889x500.png 889w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-768x432.png 768w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-1536x864.png 1536w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-2048x1152.png 2048w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-24x14.png 24w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-36x20.png 36w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271649-48x27.png 48w\" sizes=\"auto, (max-width: 7680px) 100vw, 7680px\" \/><\/figure>\n\n\n\n<p>Such breaches often have a mass-scale impact, as vulnerabilities can be exploited for all users of a particular wallet or platform. For instance,&nbsp;<a href=\"https:\/\/solana.com\/news\/8-2-2022-application-wallet-incident\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">the Slope Wallet Hack<\/a>&nbsp;has probably compromised the private keys of any user who had ever used their application. This is why when examining the largest breaches surpassing $10 million in H1 2023, 50% of top hacks involved custodial and self-custodial wallets.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"7680\" height=\"4320\" src=\"https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650.png\" alt=\"Top cryptocurrency wallets hacks chart, H1 2023\" class=\"wp-image-227\" style=\"aspect-ratio:16\/9;object-fit:contain\" srcset=\"https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650.png 7680w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-555x312.png 555w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-889x500.png 889w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-768x432.png 768w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-1536x864.png 1536w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-2048x1152.png 2048w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-24x14.png 24w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-36x20.png 36w, https:\/\/noone.io\/blog\/wp-content\/uploads\/2023\/09\/Frame-271650-48x27.png 48w\" sizes=\"auto, (max-width: 7680px) 100vw, 7680px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"c1ce\"><span class=\"ez-toc-section\" id=\"Security_Principles_of_Wallet_Development\"><\/span>Security Principles of Wallet Development<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"8dd1\">To ensure the security of self-custodial wallets, we adhere to the following principles. While these measures cannot guarantee 100% security (nothing can), they promote transparency and openness to our audience while inviting contributions from blockchain experts and enthusiasts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Device-Based_Generation_of_Private_Keys\"><\/span><strong>Device-Based Generation of Private Keys<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"bd69\">One of the fundamental aspects of wallet security is the generation and management of mnemonic phrases and private keys. Our wallet ensures that the mnemonic phrase and all derived private keys never leave the user\u2019s device. This means that the generation of the mnemonic phrase and computation of private keys happen exclusively within the client-side application, be it on iOS, Android, or a Web Extension. Additionally, transaction signing with the private key is also confined to the client side. By keeping these processes within the user\u2019s device, we mitigate the risk of exposing sensitive information.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Open_Source_Wallet_Core\"><\/span><strong>Open Source Wallet Core<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"77bb\">The core encompasses mnemonic generation, derivation of public and private keys, transaction formation, and signing. Our wallet core is developed using Kotlin, Swift, and TypeScript programming languages and&nbsp;<a href=\"https:\/\/github.com\/noonewallet\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">is publicly available<\/a>. Such transparency allows users to verify our security measures and propose improvements, ensuring that our wallet core remains resistant to emerging threats.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interoperability_through_Blockchain_Standards\"><\/span><strong>Interoperability through Blockchain Standards<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"d424\">Wallet compatibility is achieved by adhering to widely accepted blockchain standards:&nbsp;<a href=\"https:\/\/github.com\/bitcoin\/bips\/blob\/master\/bip-0044.mediawiki\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">BIP32<\/a>,&nbsp;<a href=\"https:\/\/github.com\/bitcoin\/bips\/blob\/master\/bip-0039.mediawiki\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">BIP39<\/a>, and&nbsp;<a href=\"https:\/\/github.com\/bitcoin\/bips\/blob\/master\/bip-0044.mediawiki\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">BIP44<\/a>. These standards define how wallets derive private and public keys, generate mnemonic phrases, and establish a logical hierarchy for deterministic wallets. By utilizing these standards, our users can export their mnemonic phrases and transition to other wallets that support the same standards. Likewise, users of other wallets adhering to these standards can import their mnemonic into our wallet. This interoperability empowers users and ensures they are not locked into a single wallet provider.<\/p>\n\n\n\n<p id=\"5797\">Furthermore, adhering to these standards enables Bitcoin and similar blockchains to generate a different crypto address for each transaction input and change output, thereby enhancing user anonymity (<a href=\"https:\/\/finbold.com\/guide\/what-is-utxo\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">as seen in the UTXO model<\/a>). However, many crypto wallets, including&nbsp;<a href=\"https:\/\/community.trustwallet.com\/t\/changing-the-bitcoin-receiving-address-in-trust-wallet\/518421\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">TrustWallet<\/a>, do not support this feature.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Genuine_Random_Generation\"><\/span><strong>Genuine Random Generation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"9b30\">It is essential to generate mnemonics based on a sufficient length of entropy, which represents randomness. By adhering to this principle, the number of possible mnemonics becomes astronomically large, making brute-force attacks impractical.<\/p>\n\n\n\n<p id=\"7d44\">For instance, according to research conducted by&nbsp;<a href=\"https:\/\/blog.ledger.com\/Funds-of-every-wallet-created-with-the-Trust-Wallet-browser-extension-could-have-been-stolen\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Ledger Labs<\/a>, certain TrustWallet\u2019s web extension versions suffered from a vulnerability where the entropy was only 32 bits, resulting in approximately 2\u00b3\u00b2 or ~4 billion possible mnemonics. Exploiting this weakness, an attacker could have potentially compromised around $30 million. In contrast, our wallets utilize 160-bit entropy, offering 2\u00b9\u2076\u2070 different mnemonic combinations, rendering brute-force attacks computationally infeasible:<\/p>\n\n\n\n<p id=\"d6ce\"><em>2\u00b3\u00b2 = 4,294,967,296 possible mnemonics<\/em><\/p>\n\n\n\n<p id=\"f858\"><em>2\u00b9\u2076\u2070 = 1,461,501,637,330,902,918,203,684,832,716,283,019,655,932,542,976 possible mnemonics<\/em><\/p>\n\n\n\n<p id=\"f6a1\">To prevent adversaries from replicating entropy, wallets must employ truly random number generation. We rely on well-established system libraries provided by operating systems to generate random values. Additionally, we subject our entropy to the&nbsp;<a href=\"https:\/\/csrc.nist.gov\/projects\/random-bit-generation\/documentation-and-software\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">NIST SP 800\u201322 statistical test<\/a>&nbsp;suite for the Validation of Random Number Generators, ensuring its randomness aligns with cryptographic standards.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Industry-Wide_Security_Standards\"><\/span><strong>Industry-Wide Security Standards<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"4de9\">We adhere to the&nbsp;<a href=\"https:\/\/mas.owasp.org\/MASVS\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Open Web Application Security Project Mobile Application Security Verification Standard (OWASP MASVS)<\/a>. This industry-standard framework outlines requirements and best practices for developing secure mobile applications, including those in the banking and financial sectors. By implementing the guidelines set by OWASP MASVS, we address various attack vectors, such as storage, cryptography, authentication, network communication, code quality, and protection against reverse engineering and tampering.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Internal_Audits_and_Dependency_Management\"><\/span><strong>Internal Audits and Dependency Management<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"d79e\">Before incorporating any dependencies, we conduct internal security audits to ensure their reliability. We utilize well-established and widely used libraries, minimizing the risk of potential vulnerabilities. Furthermore, we manually perform regular updates to keep our dependencies secure.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Secure_Storage_for_Entropy\"><\/span><strong>Secure Storage for Entropy<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"8ccd\">To protect the entropy used in our wallets, we utilize platform-specific encrypted key storages. For iOS, we employ KeyChain, and for Android, we rely on KeyStore. In the case of web extensions, we use Chrome Storage and IndexedDB. The retrieval of entropy from storage only occurs when necessary, such as during mnemonic export or transaction signing, and is promptly erased from RAM (Random-access memory) afterwards.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Limited_External_Content\"><\/span><strong>Limited External Content<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p id=\"e539\">To mitigate the risk of JavaScript\/HTML injections and man-in-the-middle attacks, we prioritize a cautious approach by avoiding the loading or execution of scripts from external sources. This precautionary measure helps to minimize potential vulnerabilities. Moreover, we strictly retrieve content, such as currency logos and market data, from trusted sources to ensure their integrity and security. Additionally, we implement data validation procedures to verify the format of acquired data, thereby enhancing protection against cross-site scripting (XSS) attacks.<\/p>\n\n\n\n<p id=\"4293\">It is worth noting that the importance of these security measures has been underscored by past incidents, such as&nbsp;<a href=\"https:\/\/twitter.com\/myalgo_\/status\/1649427788816842752\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">the attack on MyAlgo wallet<\/a>, where a potentially compromised CDN API key was exploited.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p id=\"fcea\">While using a cryptocurrency wallet always carries inherent risks, transparency and open development can significantly strengthen security measures and encourage collaboration among experts and enthusiasts. For instance, an&nbsp;<a href=\"https:\/\/web3isgoinggreat.com\/?id=security-firm-forced-to-publicly-disclose-issues-with-atomic-wallet\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">audit conducted by Least Authority<\/a>&nbsp;revealed critical&nbsp;<a href=\"https:\/\/beincrypto.com\/atomic-wallet-silent-details-100m-hack\/\" target=\"_blank\" rel=\"noreferrer noopener\">vulnerabilities in Atomic Wallet<\/a>&nbsp;a year before it suffered a breach resulting in $100 million in losses. Timely resolution and open collaboration could have potentially prevented such an incident. By prioritizing security measures such as generating secure mnemonics, employing genuine random number generation, following industry standards, maintaining an open-source wallet core, conducting internal audits, securely storing entropy, and limiting external content, we strive to provide clients with robust and trustworthy cryptocurrency wallets.<\/p>\n\n\n\n<p id=\"46dc\">Remember, no security system can be completely foolproof, but by prioritizing transparency, adherence to industry standards, and continuous improvement, we can minimize the risks associated with cryptocurrency wallet security and protect users\u2019 valuable assets.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Due to the occurrence of various hacks targeting DeFi protocols, wallets, and centralized exchanges, the security of digital assets has emerged as a paramount concern for users. While owning private keys is essential, it is not sufficient to ensure the safety of one\u2019s crypto assets, especially considering that the wallet itself stores and utilizes the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":238,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-221","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-beginner"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Trust through Transparency: Insight into Crypto Wallet Security -<\/title>\n<meta name=\"description\" content=\"Discover the essentials of cryptocurrency wallet security and learn how Noone Wallet ensures the safety of your digital assets.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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