How to store Bitcoin seed phrase offline long term
Frozen Security designs, manufactures, and sells a patented physical seed storage system and a stateless offline signing terminal for cryptocurrency private keys. The product encodes BIP-39 seed phrases as precision-drilled patterns in titanium plates and pairs those plates with an optical, volatile-memory signing terminal that performs on-demand transaction signing with no key stored at rest. Frozen Security provides a companion app to prepare transactions locally and a complete security model that eliminates firmware-stored keys, encrypted keystores, and cloud backups. The company positions this stack as a premium, migration‑proof alternative to traditional hardware wallets and steel backup products.