SSP Wallet launched on 22 January 2024 as a different kind of crypto wallet: a true 2-of-2 multisignature address where every transaction needs two devices to sign. Security and self-custody are not optional add-ons here — they are the design. This is the launch piece for v1.0.0, the first public release.
TL;DR
- SSP Wallet went live on 2024-01-22 as a 2-of-2 multisig wallet.
- Two devices, two private keys, one address. Neither device can move funds alone.
- SSP Wallet is the browser extension. SSP Key is the mobile companion that co-signs.
- Bitcoin and Flux are supported at launch; more chains followed in later releases.
- Open source and self-custodial — your keys, your coins, on your hardware.
What SSP Wallet is
SSP Wallet is a browser extension that pairs with SSP Key, a mobile app on your phone. Together, they form a 2-of-2 multisignature address. The extension proposes and partially signs a transaction. The mobile app reviews and adds the second signature. Without both, nothing moves.
This is not a hardware wallet, and it is not a single-device hot wallet. It is a software-based 2-of-2 multisig where the two signers live on two separate devices you already own — your laptop and your phone. The split is what makes the system resilient: an attacker has to break both at once to steal anything, and that is a meaningfully harder problem than breaking one.
Why 2-of-2 multisig matters
A standard wallet has one private key. Steal the key, steal the coins. A 2-of-2 multisig splits signing authority across two devices. An attacker who compromises one device still cannot sign a transaction — they would need to compromise both, simultaneously, with two different threat profiles.
The same logic applies to physical loss. If your laptop is stolen, the thief cannot drain the wallet without your phone. If your phone is lost, the laptop alone cannot empty the account either. Recovery is handled separately, so a missing device is not the same as missing funds.
For a deeper comparison of multisig setups, read our explainer on 2-of-2 vs 2-of-3 vs m-of-n multisig.
The security model in one paragraph
The two private keys, their extended private parts, and the seeds are never shared between SSP Wallet and SSP Key. Each device generates and keeps its own key material locally. The extension never sees the mobile key, the mobile app never sees the extension key, and nothing is ever reconstructed on a server. Transactions are constructed on SSP Wallet, signed once with its key, then handed to SSP Key, which signs again with its own key before broadcast. Every interaction requires both devices to participate, which is what makes the wallet a true 2-of-2.
What you can do today
At launch, SSP Wallet supports Bitcoin and Flux. You can receive, send, and self-custody on both chains using the same 2-of-2 flow. The wallet handles address derivation, transaction construction, and the two-step signing dance for you — once paired, day-to-day use feels like any other wallet, with one extra confirmation on the phone.
More chains arrived in subsequent releases — this article covers v1.0.0, so we are intentionally not previewing those here. If you are arriving from a later release, the multichain support has grown considerably since this post was written.
Get SSP Wallet
Install the extension from the Chrome Web Store, then pair it with SSP Key on your phone. Setup walks you through generating both keys and verifying the pairing before any funds are at risk. The whole flow is open source, so if you want to read the code before you trust it with coins, you can.
Source: SSP Wallet v1.0.0 release notes.