Self-custodial wallet provider Ambire has announced Ambire Ice, an open-source hardware wallet designed specifically for Ambire and Safe smart accounts. The device was unveiled on October 30, 2026, in Sofia, Bulgaria, and addresses one of the key challenges facing advanced Ethereum users: understanding exactly what they are signing before approving on-chain transactions.

Unlike conventional hardware wallets, which can display complex smart contract interactions as difficult-to-interpret signing requests, Ambire Ice focuses on transaction transparency. Its on-device decoding technology reconstructs Safe transactions and presents individual operations directly on the hardware wallet's screen, allowing users to review transfers, token approvals, and bundled transactions before confirming them. The gap it targets is often described in the industry as blind signing: hardware wallets were originally built to guard private keys, and a signature a user cannot read is, in practice, a signature they cannot verify. In smart account flows, where a single approval can bundle transfers, token permissions, and contract calls, the contents of a signature matter as much as the key that produces it.

The approach is particularly relevant for multisig operators, decentralized autonomous organizations (DAOs), and treasury managers, who often need to approve complex transactions involving multiple operations and smart contracts. Safe — the smart account standard Ice is built around — is widely used for precisely these setups, where a shared treasury requires several signers to approve the same transaction. By making transaction details easier to inspect, Ambire aims to reduce the risks associated with blindly signing requests.

Clear Signing and Multiple Layers of Protection

Ambire Ice introduces several security features designed to combine transaction transparency with hardware-level protection.

A central capability is on-device clear signing. The wallet decodes Safe transactions and displays their individual actions, including transfers and token approvals. It also issues warnings when a transaction involves potentially sensitive changes to Safe configurations, such as modifications to owners, signature thresholds, or installed modules. Those warnings matter because changing owners or thresholds effectively determines who controls a treasury's funds going forward.

The device further features a dual secure-element architecture combining chips from NXP and Infineon. Secure elements are specialized, tamper-resistant chips designed to isolate key material from a device's general-purpose software. According to Ambire, using two independent secure elements is intended to strengthen protection against different types of physical attacks and improve the security of private keys.

Another notable feature is a physical airgap switch. When activated, it disconnects USB data and cuts Bluetooth power at the hardware level, enabling users to sign transactions offline using animated QR codes without relying on conventional wireless or wired data connections. USB and Bluetooth connectivity remain available as optional connection methods.

Open-Source Design and Post-Quantum Potential

Transparency is a major part of the Ice design philosophy. Ambire plans to provide inspectable hardware designs, board files, and firmware based on a fork of Trezor's open-source code. The wallet also features a transparent enclosure, allowing users to visually inspect its internal components. The company says this approach reflects the project's emphasis on verifiability and reducing reliance on closed hardware systems. For hardware wallets, that verifiability has practical weight: published designs and firmware give independent researchers a way to audit what a device does rather than take its security on faith.

Looking further ahead, Ambire Ice is designed with a potential post-quantum upgrade path in mind. Post-quantum signing refers to cryptographic schemes intended to withstand attacks from future quantum computers, which could in principle threaten the elliptic-curve signatures Ethereum relies on today. The proposed approach involves adding a post-quantum signing mechanism through an additional Safe owner — a route that would introduce quantum-resistant approvals alongside a Safe's existing signers. However, this functionality remains subject to further development and network support.

Pricing, Preorders, and Availability

Ambire expects preorders to open shortly after October 30, 2026. The initial release will be limited to 200 devices, available on a first-come, first-served basis.

The planned retail price is $150, while the first preorder round will offer a discounted price of $119, including a $10 deposit. Shipping is currently expected to begin in early 2027. The timeline sets up clear checkpoints to watch: whether preorders open on schedule, whether the promised hardware designs, board files, and firmware are published for inspection, and whether the early-2027 shipping window holds.

With Ice, Ambire is targeting a growing segment of the Ethereum ecosystem that requires more than basic private-key protection. By combining smart account compatibility, transaction decoding, dual secure elements, and optional offline signing, the company aims to make hardware-based transaction approval more transparent and accessible.

As smart accounts and multisig operations become increasingly important across DeFi, DAOs, and institutional crypto management, solutions that allow users to verify not only who they are signing with but also what they are authorizing could become an increasingly important part of wallet security.

Source: Metaverse Post