Is Keystone safe? What its own terms say
Is Keystone safe to use for casino deposits?
Keystone's terms disclaim custody and access to your keys, so by their account only you can sign a deposit. Its terms name no gambling rule (keyst.one, read 2026-10-07), which is an absence, not a permission. Contracting party: Yanssie HK Limited, operator of the Keystone brand. 6 points are not verified. No primary-source incident is recorded.
Documents last checked Reviewed by CryptoGuardz Register Desk, editorial desk
Disclosure: CryptoGuardz has no commercial relationship with Keystone, earns nothing if you install it, and has not contacted the company or given it notice of this entry. Every statement below is either a verbatim quote from a document Keystone publishes or a statement about a public record, and both carry the date they were read. Corrections go to the corrections page.
1. What this means for you
Consequences first, in the conditional, each one produced by a clause in a document Keystone publishes itself. Every line links to that clause, quoted in full and dated. None of them is a claim that Keystone can move your coins on chain: the terms disclaim that power and this register takes them at their word on it.
- You are contracting with someone you cannot name if you use the swap, the on-ramp or the staking inside the app 2 sub-service clauses are recorded across 1 kinds of service, and most of the counterparties are identified in the terms only as a third party.
- You can recover no more than a stated cap if Keystone is liable to you at all The aggregate liability clause caps every claim you could bring, whatever the size of the balance the software was holding the keys to.
2. What this entry records, and what it does not
This register publishes no number for a wallet. The payout score on the casino register has five defined components and a published arithmetic; no equivalent instrument exists here. What follows is a field-by-field account of what was read, where and when.
| Binding terms | Read in full6 clauses captured verbatim across 4 topics, retrieved 2026-10-07 |
|---|---|
| Contracting entity | Yanssie HK Limited, operator of the Keystone brandHong Kong SAR. The terms give a Kowloon address (19H Maxgrand Plaza, No.3 Tai Yau Street, San Po Kong), choose Hong Kong law and give Hong Kong courts exclusive jurisdiction. The HK in the company name and the address point to Hong Kong incorporation, but the terms do not state the place of incorporation in words. |
| Custody position in the terms | Disclaims custody and disclaims access to key materialAsserted from the clause. The terms state Keystone does not have access to private keys or recovery phrases and cannot recover them. The privacy policy adds that the hardware wallets are offline products through which Keystone cannot collect information. |
| Sub-services | 2 clauses recordedSwap. A count of recorded clauses, not of distinct companies. |
| Code audit | Not measuredNo security audit, source review or reproducible-build check has been carried out or read by this register. A wallet's safety is largely decided there, and nothing on this page speaks to it. |
| First-party test | Not measuredNo transaction has been signed, no swap executed and no recovery flow run through this product by this register. |
| Default node provider | Not disclosedNo RPC or node provider is named in any primary document retrieved. |
3. What we could not verify
Every entry carries this section. The gaps are published because a reader deserves the limits of the check as well as its results.
- The swap provider or aggregator behind the Keystone Nexus Swap feature. Not named in the terms or privacy policy.
- Whether the Keystone Nexus app has a suspension or termination clause. The Terms of Use contain none that was found, and no separate app terms were located.
- Whether the swap service screens addresses. Neither document says.
- Place of incorporation of Yanssie HK Limited. Inferred from name and address only; not checked against the Hong Kong Companies Registry.
- TON and BNB Chain. Listed as supported assets but not in a quoted network sentence, so not recorded in chains.
- Documented incidents. No primary-source incident was located. Absence here is absence of a search result, not evidence of no incident.
4. Who you are contracting with
The binding document names a company and states where it is registered or which law governs. The detail and the clause are below.
| Named counterparty | Yanssie HK Limited, operator of the Keystone brandsource · retrieved 2026-10-07 |
|---|---|
| Jurisdiction | Hong Kong SAR. The terms give a Kowloon address (19H Maxgrand Plaza, No.3 Tai Yau Street, San Po Kong), choose Hong Kong law and give Hong Kong courts exclusive jurisdiction. The HK in the company name and the address point to Hong Kong incorporation, but the terms do not state the place of incorporation in words. |
| Relationships disclosed | The privacy policy refers to Yanssie HK Limited and affiliated companies without naming the affiliates, and names Shopify, Google Analytics, Cloudflare and Zendesk as processors. |
These Terms of Use govern access to services provided by Yanssie HK Limited, operator of the Keystone brand.keyst.one
These Terms are governed by the laws of the Hong Kong Special Administrative Region.keyst.one
5. The custody claim, and what the binding document says
What Keystone says in the place a user reads, against what it says in the place that binds a user.
Keystone secures your digital assets with an 100% open source air-gapped cold wallet built for true self-custodykeyst.one · 2026-10-07
We do not store cryptocurrencies. We do not control blockchain transactions. We do not have access to private keys or recovery phrases.keyst.one · 2026-10-07
keeps your private keys offline, fully in your hands, and safe from online threatskeyst.one
The Company cannot restore or recover lost private keys, passwords, or recovery phrases.keyst.one
Hardware wallet: custody is the device. The single Terms of Use cover the website, products and services, including signing with the Keystone Nexus companion app; no separate app terms were found. The "100% open source" claim is Keystone's marketing and was not tested.
6. Recovery, and where the terms and the marketing differ
| Cloud or hosted backup offered | no |
|---|---|
| What is stored | Nothing by Keystone, by the terms. The user holds the recovery phrase. |
| Where | On the device and in the user's own record of the recovery phrase. |
| Changes the custody position | no |
The Company cannot restore or recover lost private keys, passwords, or recovery phrases.keyst.one
No difference found. The terms, privacy policy and homepage agree that Keystone holds no key material. No cloud backup product was found in the documents read.
7. The app is not the wallet
2 clauses, each one a place where the product routes a user to a counterparty the user never contracts with by name, under terms the user never opens. The count is of recorded clauses and not of distinct companies: two entries can name the same counterparty and each still be a separate thing the terms permit.
Our Services may include links or API integrations to third-party websites, products, or services that we do not own or control, including decentralized protocols or aggregators offering asset swap functionalities.keyst.one
When you use the Swap feature within the App, a service fee may apply. This fee is either included in the quoted price or otherwise disclosed to you.keyst.one
8. Withdrawing your access to the interface
Your keys are yours. The software you reach them through is licensed, and the licence can be withdrawn. 0 clauses are recorded on this point.
9. Who can block an address
Keystone claims no power to block an address in the documents read. No clause in the documents read discloses that another party in the stack can freeze or blacklist an address either. That is an absence of disclosure, not a guarantee that no such party exists.
10. What the terms say about gambling
Position recorded: not disclosed. No clause naming gambling, betting, casinos or wagering was found in the documents read. That is an absence in the documents, not a permission, and the general prohibition on unlawful use still applies.
The card side of the same question is on the card register, and the casino side on KYC on withdrawal.
11. Chains it names
Of the eight chains this register filters on, Keystone names 6: Bitcoin, Ethereum, Solana, Polygon, Base, Tron. Not named on the pages read: TON, BNB Chain. Networks named in the quoted sentence. The same page lists Toncoin and BNB among supported assets, but as assets rather than in a sentence naming networks, so TON and BNB Chain are not recorded. Support on the device does not mean support in every companion wallet.
Keystone supports 30+ major blockchains including Bitcoin, Ethereum, Solana, Polygon, Arbitrum, Optimism, Base, zkSync, Linea, Avalanche, Tron, Polkadot, Cosmos, Near, Aptos, Sui, and many more.keyst.one
12. Liability, amendment, arbitration and where you can use it
The aggregate liability clause caps every claim you could bring at a stated cap, whatever the balance involved. It is the clause that decides what the rest of the document is worth.
In no event shall our total liability exceed the amount paid for the applicable product.keyst.one
We make no guarantees regarding the availability of blockchain networks, the functionality of third-party wallets, or compatibility with future blockchain protocol changes.keyst.one
Continued use of the Services after updates constitutes acceptance of the revised Terms.keyst.one
You are not located in a country subject to international sanctions or export restrictions. You are not listed on any government sanctions list or restricted persons list.keyst.one
What the provider states it processes, and who it passes it to. Recorded because a wallet that never touches a key can still see every address you hold.
When you use the Swap feature, we automatically collect your device's IP address to help ensure security, detect and prevent fraud or abuse, and optimize the performance of our services.keyst.one
Keystone hardware wallets, including Keystone Tablet, are 100% offline products. That means that we cannot and do not collect any information from you through these offline products.keyst.one
13. Public record
No incident is recorded for Keystone. That is not a clean bill of health. No primary source, meaning a company disclosure, a public vulnerability register entry or a regulator action, was located within this collection. Absence of a record here is the absence of a search result.
14. Who should avoid Keystone
Anyone who needs a named party to be answerable for a loss. The liability position is a stated cap, and the terms disclaim responsibility for every third-party service the app routes you into.
Related entries
Or read the whole wallet register, the card register, the same method applied to exchanges and to crypto casinos, the clause library at clause watch, or how this register works.