sha3.si is for sale

A four-character, exact-match name for SHA-3, the NIST hash standard at the core of the new post-quantum cryptography, and a working SHA-3 tools site already built on it.

Why this name is worth owning

• It is the name of a standard. "SHA-3" is NIST FIPS 202. Every security engineer, cryptographer and blockchain developer knows it, so the name needs no explanation and no ad budget to be understood.
• Short and exact. Four characters before the dot. Easy to say, type and remember, and it matches what people search for.
• Rising with post-quantum migration. SHA3-256, SHA3-512, SHAKE128 and SHAKE256 sit inside ML-KEM and ML-DSA, the post-quantum standards that governments and companies must now adopt. Interest in SHA-3 grows with every migration plan.
• Two markets in one word. NIST SHA-3 for security and compliance, and Keccak (its original form) for Ethereum and every EVM chain.
• .si reads as "super intelligence". The extension carries the 2026 "SI" naming for AI, which adds a second, AI-security reading to the name.
• Not an empty name. It comes with a live quantum-safety checker (does a website accept post-quantum ML-KEM key exchange?), a private SHA-3 calculator, four dedicated tools and reference pages, already submitted to search engines.
• A ready lead source for post-quantum vendors. Everyone who runs the checker is someone asking whether their systems are quantum-safe, exactly the audience post-quantum, PKI and HSM companies pay to reach.

Who it is for

What you get

• The domain sha3.si, moved to your account after payment.
• The quantum-safety checker: the web page and the checker service (Go, open source), ready to move to your hosting.
• The current website: a SHA-3 calculator (SHA3-224/256/384/512, SHAKE128/256, Keccak-256, text and files), dedicated tool pages, guides, test vectors and code examples, all static and fast.
• Its search presence: pages submitted to Google and Bing, with structured data, a sitemap and an llms.txt for AI assistants.

Frequently asked

How do I buy sha3.si?

Through the Dynadot marketplace listing: buy at the listed price or send an offer. Payment is handled by Dynadot, which then moves the domain into the buyer's Dynadot account.

Can I keep the domain at another registrar?

Yes. After the purchase you can transfer it out of Dynadot to the registrar of your choice once any post-sale lock has passed.

Is the website included?

The current SHA-3 calculator and reference pages can be handed over with the domain, so the name keeps serving its visitors from the first day.

Can I make an offer below the listed price?

Yes. Use "Make an offer" on the Dynadot listing. Every serious offer gets a reply.