Bitcoin Core Güvenlik Denetimi: Üçüncü Taraf İncelemesiyle Doğrulanan Ağ Güvenliği

Primary security audit was completed during a time when it was not even performed at the earliest stages in the form of an open-source third-party review for Bitcoin Core, and the findings showed that the reference implementation did not harbor any serious or high-risk security vulnerabilities. Conducted by Quarkslab, funded by the Open Source Technology Improvement Fund and Brink, the study was carried out as a 100-person-day assessment between May and September and uniquely examined components such as the P2P network layer, memory pool (mempool), chain management, and consensus logic. The only security non-compliance issues identified were noted as two low-level issues and 13 informative suggestions; none of these items were classified as vulnerabilities according to Bitcoin Core criteria.

Quarkslab developed new fuzzing branches for block connection and chain reorganization processes; thus, previously untested code paths were executed, and improvements were proposed in thread safety and general testing infrastructure. Engineers involved in the audit, @RobinDavid1, @MihailKirov1, and Kaname, collaborated with @OSTIFofficial overseeing the study and @bitcoinbrink providing funding. The details of the security audit were shared in a blog post: https://t.co/xPkDEV7LDy

Achieving network security approval through a third-party review, was considered a critical milestone in Bitcoin’s open-source development model. Since Satoshi Nakamoto’s 2009 recordings, the development process with over 43,000 commits has been strengthened with external expert security. While internal security practices offer the advantage of continuous community review, this independent corporate security assessment, funded by Brink and donor support, had not been previously subjected to an official independent audit.

Three Quarkslab engineers—Robin David, Nicolas Surbayrole, and Mihail Kirov—conducted the review in collaboration with Niklas Gögge from Brink and Antoine Poinsot from Chaincode Labs. After the audit, Robin David summarized the process on X as follows: “A blessing in terms of code maturity and security culture; the challenge we face is a curse.” At the start of the audit, the team visited Brink’s London office to deeply explore the Bitcoin Core architecture and developer practices.

The audit focused on areas including open target P2P communication and the related consensus and policy validation logic; a total of 100 audit days were carried out with a balanced approach, including manual code review, dynamic tests with Bitcoin workflows, and rarely tested different fuzzing approaches. Upon completion, Quarkslab presented a test suite that would strengthen the existing coverage, a Docker image enabling bulk fuzzing campaigns, and an experimental regression testing tool based on Bitcoin’s reference points. Additionally, various experimental studies involving different fuzzing techniques were reported.

Market Volatility and Security Assurance

Regarding Bitcoin’s price movements, Matt Hougan, Chief Investment Officer at Bitwise, stated that despite market volatility, the core value proposition remains intact and described the decline as a short-term noise. If we emphasize what he underlined {% vurgu koyduğumuz şey} according to his assessment, long-term demand and commitment to service delivery keep Bitcoin’s value sustained. Michael Saylor, on the other hand, argued that institutional adoption does not increase volatility and stated that volatility has decreased over time, roughly around 50% currently, considering it started in 2020. Following the publication of the audit, Bitcoin was trading around $91,616 but experienced a 12% decline last week, erasing its 2025 gains. Expert opinions continue to debate whether the selling pressure signals a deeper correction in various ways.