Submission declined on 31 May 2026 by ChrysGalley (talk). This draft appears to contain text generated by a large language model (such as ChatGPT). You cannot use LLMs to generate article content. LLM-generated pages with certain obvious signs of being machine generated may be deleted without notice. Instead, only summarize in your own words a range of independent, reliable, published sources that discuss the subject. See the advice page on large language models for more information. This draft's references do not show that the person meets Wikipedia's criteria for inclusion for people. The draft requires multiple published secondary sources that: provide significant coverage: discuss the person in detail, not brief mentions or interviews lacking independent analysis; are reliable: from reputable outlets with editorial oversight; are independent: not connected to the person, such as interviews, press releases, the subject's own website, or sponsored content. Please add references that meet all three of these criteria. If none exist, the subject is not yet suitable for Wikipedia. If you would like to continue working on the submission, click on the "Edit" tab at the top of the window. If you have not resolved the issues listed above, your draft will be declined again and potentially deleted. If you need extra help, please ask us a question at the AfC Help Desk or get live help from experienced editors. Please do not remove reviewer comments or this notice until the submission is accepted. Where to get help If you need help editing or submitting your draft, please ask us a question at the AfC Help Desk or get live help from experienced editors. These venues are only for help with editing and the submission process, not to get reviews. If you need feedback on your draft, or if the review is taking a lot of time, you can try asking for help on the talk page of a relevant WikiProject. Some WikiProjects are more active than others so a speedy reply is not guaranteed. How to improve a draft Wikipedia:Contributing to Wikipedia – a basic overview on how to edit Wikipedia. Help:Wikitext – how to use the markup Help:Referencing for beginners – how to include references Wikipedia:Article development – how to develop your article Wikipedia:Writing better articles – how to improve your article Wikipedia:Verifiability – make sure your article includes reliable third-party sources You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Add tags to your draft Editor resources Easy tools: Citation bot (help) | Advanced: Fix bare URLs Declined by ChrysGalley 2 months ago. Last edited by Kierissos 2 months ago. Reviewer: Inform author. Resubmit Please note that if the issues are not fixed, the draft will be declined again.

• Comment: Clear AI fingerprints here, name-checking sources rather than summarising them. LLM may not be used in drafts. But the key issue is that we need truly independent sources talking about the subject. The subject is not covered by WP:NACADEMIC therefore the WP:GOLDENRULE applies where we need fully independent profiles, not trade related content that looks press release related. ChrysGalley (talk) 14:24, 31 May 2026 (UTC)

Konstantinos Chalkias, also known as Kostas Kryptos, is a Greek cryptographer, blockchain engineer, entrepreneur and academic. He is a co-founder and Chief Cryptographer of Mysten Labs, a blockchain unicorn valued at more than $2B in 2022^[1].

Chalkias has worked on applied cryptography and distributed systems in the blockchain industry, including R3's Corda distributed ledger, Facebook's Libra/Diem project, Sui blockchain, Walrus decentralized storage, DeepBook smart-contract trading, various zero-knowledge proof systems, like Winterfell and zkLogin, and proof-of-solvency algorithms.^[2][3][4].

Chalkias studied computer science and cryptography in Greece, he has a BSc in Applied Informatics, a Masters in Computer Systems and a PhD in Security and Cryptography. He is also a dropout from Electrical and Computer Engineering at Aristotle University of Thessaloniki and later in the School of Medicine at Aristotle University of Thessaloniki, leaving both programs before graduation^[5].

Chalkias started his career as an academic in University of Macedonia and worked in various security, big-data and software-engineering companies, such as Erybo in California and Safemarket in Greece^[6]. His career is spanning to more than 20 years in software engineering across the United States, United Arab Emirates, the United Kingdom and Greece^[7].

Chalkias worked at R3 along with Mike Hearn (one of the first developers of Bitcoin), where he served as Head of Research and worked on cryptographic components for Corda, an enterprise distributed ledger technology^[8]. He later worked at Facebook as a lead cryptographer, where he led teams on Libra, Novi and WhatsApp^[9]. In 2021, along with his colleagues at Meta Evan Cheng, Sam Blackshear, Adeniyi Abiodun and George Danezis, Chalkias co-founded Mysten Labs.

Chalkias's work focuses on applied cryptography, blockchain security, digital signatures, zero-knowledge proofs, authentication, privacy-preserving systems, artificial-intelligence-assisted security analysis and post-quantum cryptography^[10]. Inc. Arabia reported that he had published more than 50 scientific papers^[11].

Chalkias has written and spoken publicly about emerging security threats to blockchains, including artificial intelligence, quantum computing and state-backed cybercrime. In an October 2025 opinion article for CoinDesk, he argued that the cryptocurrency industry should treat artificial intelligence and quantum computing as strategic security risks and begin upgrading infrastructure toward post-quantum cryptography and AI-aware security models^[12]. In a separate October 2025 CoinDesk article on North Korean cyber operations, Chalkias was quoted on the use of large language models for blockchain code analysis, reconnaissance, phishing and exploit replication. The article described his view that AI posed a more immediate threat to blockchain security than quantum computing, particularly because AI tools can be used to scan codebases, identify vulnerabilities and reproduce exploits across multiple blockchain systems^[13]. In May 2026, the Financial Times quoted Chalkias in an article on the crypto industry's preparations for quantum-computing risks, identifying him as chief cryptographer at Mysten Labs^[14].

In December 2024, Inc. Arabia included Chalkias in The GCC's Tech Vanguard, a special feature celebrating 30 innovators in the Gulf region's technology sector^[15][16].

The Block lists Chalkias in its profile series of notable crypto personalities, describing him as a co-founder and Chief Cryptographer of Mysten Labs with a PhD in identity-based cryptography^[17].

Category:Greek computer scientists Category:Greek entrepreneurs Category:Living people