[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1a8o57j0ufd8m":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":9,"domain":10,"breachDate":11,"addedDate":12,"modifiedDate":12,"contentUpdatedAt":13,"source":14,"sourceUrl":15,"sourceUrls":16,"pwnCount":17,"affectedCount":17,"affectedCountStatus":18,"affectedCountLowerBound":19,"affectedCountUnit":20,"hasEnglishDescription":4,"severity":21,"dataClasses":22,"description":31,"seoTitle":32,"seoTitleEn":33,"seoDescription":32,"seoDescriptionEn":34,"logoUrl":35,"isVerified":4,"isSensitive":4,"isSpamList":36,"isMalware":36,"company":37},"68e3266eda11adda4882510f","Bitcoin Talk","Bitcoin Talk Data Breach","bitcoin-talk","bitcointalk.org","2015-05-22T00:00:00.000Z","2017-03-27T23:45:41.000Z","2026-07-18T23:44:13.742Z","Verified breach record","https:\u002F\u002Fdatabreach.com\u002Fbreach\u002Fbitcoin-talk-2015",[15],501407,"known",null,"unknown","High",[23,24,25,26,27,28,29,30],"Dates of birth","Email addresses","Genders","IP addresses","Passwords","Security questions and answers","Usernames","Website activity","\u003Cp>The Bitcoin Talk data breach is a verified account data incident on May 22, 2015, affecting users of Bitcointalk.org, one of the most well-known forums in the cryptocurrency community. The forum has long been a central meeting place for discussions in the Bitcoin ecosystem, including mining, wallet security, project announcements, and community interaction. Therefore, the incident is not just a matter of a forum account; it requires high attention because the same usernames, email addresses, and password habits can be linked to cryptocurrency accounts, exchange accounts, wallet services, and social platforms. The verified scope is associated with 501,407 unique email addresses.\u003C\u002Fp>\n\u003Cp>The breach included fields such as email addresses, usernames, IP addresses, gender information, birth dates, password hashes, security questions and answers, and site activity. This combination of data indicates situations where changing only the password does not eliminate all risk. If security question answers were used similarly on other services, password reset flows could be weakened. IP addresses and site activity, on the other hand, can provide additional context about the user's forum history, time zone, technical interests, and identity within the cryptocurrency community.\u003C\u002Fp>\n\u003Ch2>Leaked Data Types and Risks\u003C\u002Fh2>\n\u003Cp>Verified data classes consist of fields such as birth dates, email addresses, gender information, IP addresses, passwords, security questions and answers, usernames, and site activity. An email address carries direct contact and phishing risk. A username allows the same nickname to be searched for on other forums, exchanges, or social platforms. IP addresses can provide indirect clues about location and connection history. Birth date and gender information can have a personalization effect for profile inference and fake support messages.\u003C\u002Fp>\n\u003Cp>Password hashes and security question answers are the most critical parts of this incident. Even if passwords are not visible in plain text, weak or reused passwords can be tried on different accounts. Security questions pose a more persistent risk because many users repeat the same answers across different services for years. In cryptocurrency communities, account takeover can lead not only to social reputation loss but also more serious consequences such as fake investment guidance, wallet recovery traps, targeting exchange accounts, and attempts to gain trust through forums.\u003C\u002Fp>\n\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\n\u003Cp>The represented breach date should be recorded as May 22, 2015, the verified addition date as March 27, 2017, and the number of affected unique emails as 501,407. The record is associated with the domain Bitcointalk.org, and the data classes are limited to forum account information. Claims that payment cards, bank accounts, private keys, wallet seeds, crypto asset balances, government-issued IDs, or physical addresses were exposed are not included in this assessment; these areas are not among the verified data classes.\u003C\u002Fp>\n\u003Cp>Due to the forum's role in the cryptocurrency ecosystem, user impact can be perceived as broader than the technical weight of the data classes. However, the correct boundary should remain with the registered fields: account identity, contact information, IP information, security question answers, password hashes, and forum activity. A positive match indicates that the user is present in this data set; this does not mean that the person's wallet has been compromised today or that their crypto assets have been directly leaked. The risk is that old account data could be tested on other services and used in social engineering.\u003C\u002Fp>\n\u003Ch2>User Groups at Risk\u003C\u002Fh2>\n\u003Cp>People in the highest risk group are those who use the same email address on Bitcoin Talk, cryptocurrency exchanges, wallet services, and social media accounts. Forum members who have kept the same username for a long time can also be more visible targets. Old signature campaigns, project announcements, mining discussions, or publicly available message history can give attackers the opportunity to guess the user's interests and financial habits. Therefore, an old identity on the forum can be used in fake investment, wallet recovery, or account support messages even years later.\u003C\u002Fp>\n\u003Cp>Users who create security question answers with real personal information should also be cautious. Security answers combined with date of birth and gender information provide a more convincing basis in account recovery attempts. The risk is even higher for developers, miners, investors, and project managers active in the cryptocurrency sector, because a connection can be established between the forum identity and the professional or financial identity. If the same password or similar security answer is used on different accounts, the impact extends beyond the Bitcoin Talk account.\u003C\u002Fp>\n\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\n\u003Cp>The user in the positive match area must first secure their email account. The email account should have a unique and strong password, multi-factor authentication, recovery address verification, and active session checks completed. Then, any password that may have been used during the Bitcoin Talk period must be removed from all accounts where it was used in the same or similar manner. Cryptocurrency exchanges, wallet-linked services, forums, social media accounts, and old project accounts should be included in this checklist.\u003C\u002Fp>\n\u003Cp>Security question answers should be replaced with unique and hard-to-guess values instead of real information. If one of the old answers was used on another service, that service should also be considered risky. Independent verification is required before clicking on links in cryptocurrency-themed emails and private messages. Messages with titles such as wallet recovery, airdrop, investment offer, account verification, forum reputation sale, or old membership renewal should be checked especially carefully. Using a password manager and generating a different password for each account significantly reduces immediate risk.\u003C\u002Fp>\n\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\n\u003Cp>In the long term, cryptocurrency community accounts should be protected with the same security discipline as financial accounts. Even if a forum account does not hold money directly, it can still create a ground for fraud through user identity and trust. Users should use a separate email address, hardware-based or app-based multi-factor authentication, and a unique password for cryptocurrency accounts. Maintaining the same nickname across all platforms increases visibility, so for critical accounts, a separate identity should be preferred.\u003C\u002Fp>\n\u003Cp>Old forum accounts should be reviewed at regular intervals, unused accounts should be closed, or at least passwords and recovery options should be renewed. Security questions should be disabled if possible; if mandatory, the answers should be random values stored in a password manager. It should not be forgotten that fields such as IP address and forum activity provide context in social engineering. Cryptocurrency users should also make it a permanent habit not to share wallet seeds, private keys, or exchange session information through any messaging channel.\u003C\u002Fp>\n\u003Ch2>Record Control and User Action\u003C\u002Fh2>\n\u003Cp>A positive result for Bitcoin Talk indicates that the checked email address was found in the May 22, 2015 dataset of Bitcointalk.org. This result means that fields such as username, IP address, date of birth, gender information, password hashes, security questions, and forum activity associated with the email address could be at risk. If the result is negative, it only indicates that no match was found in this particular dataset; it should not be concluded that the person did not participate in other cryptocurrency, forum, or exchange events.\u003C\u002Fp>\n\u003Cp>The correct sequence of actions should be to protect the email account, separate reused passwords, change security question answers, enable multi-factor authentication on cryptocurrency services, and review accounts linked to the forum identity. Investment, recovery, support, and account verification messages that come with the same email or username should be considered suspicious. In particular, no request asking for a wallet seed, private key, exchange code, or identity document should be accepted directly.\u003C\u002Fp>","","Bitcoin Talk Data Breach (501.4 Thousand Reported Records)","Bitcoin Talk Data Breach. 501.4 Thousand reported records were reported. Reported data: Dates of birth, Email addresses, Genders. Review the scope, risks, and…","\u002Fuploads\u002Flogo\u002Fbitcointalk_org.webp",false,{"name":7,"sector":38,"country":39,"website":10,"websiteArchiveUrl":32,"websiteStatus":32,"websiteCheckedAt":19},"Cryptocurrency forum","Global"]