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Dual Secure Element for Key Storage

Many hardware wallets rely on the main microprocessor to protect critical data. PineBridge takes a different approach by using two secure elements, each from different suppliers, to keep your Bitcoin safe.

PineBridge specifically incorporates Microchip's ATECC608 and Maxim's DS28C36B to securely store your 24-word BIP39 seed phrase.

For a breach to occur, all three elements — both secure chips and the main microprocessor — would need to be compromised.

Genuine vs. Caution Lights

To counter tampering attempts, such as “Evil Maid” attacks, PineBridge firmware is signed with a factory key. During startup, the firmware signature and almost every flash memory byte are verified, setting either a green or red light accordingly.

Light status control is handled by dedicated circuitry connected to a secure element, ensuring software cannot alter it. The exposed light circuitry allows for easy detection of tampering.

Anti-phishing Words

PineBridge’s PIN is split into two parts, like 1234-5678. After entering the first part, two unique words appear on-screen, tied to each specific PIN prefix and PineBridge device. (These words are generated securely and are not accessible outside the device.)

By memorizing these words and verifying them each time, you protect against fraudulent devices that might imitate your PineBridge without knowing these unique words.

Physical Security

The specially designed PCB heightens SE probing resistance. PineBridge’s clear casing is also part of its security model, allowing users to visually inspect for unauthorized hardware alterations.

Due to the in-depth secure element usage, PineBridge has no factory reset option. Forgotten PINs cannot be recovered, so proper disposal is advised.

For added security, a label with "SHOOT THESE" indicates the best points for device destruction when necessary.

Air Gap Operation

PineBridge operates without connecting to a computer. All functionalities are accessible via USB power packs or AC adapters, from initial setup to ongoing usage:

• Set up PIN and configure.

• Create or import a 24-seed phrase using TRNG, existing keys, or dice rolls.

Dice Roll and Verified Bitcoin Seed Creation

If you prefer not to use the built-in random number generator, PineBridge lets you create a BIP39 seed phrase through dice rolls. Input the values (1–6) for each roll, with 99 rolls recommended, to produce a secure, dice-based seed phrase. Learn how to verify the calculations here.