Esignus Cold Wallet Card is a hardware-based cryptographic key storage device designed in the form factor of a standard card. It is intended to securely store private keys offline, keeping them isolated from internet-connected environments to reduce exposure to remote attacks. The device operates as a cold wallet, meaning private keys never leave the hardware and signing operations are performed on the card itself. This air-gapped approach is designed to protect cryptographic material from malware, phishing, and remote compromise. Key characteristics of the product include: - Physical card form factor for portability and ease of carry - Offline (cold) storage of private keys - On-device cryptographic signing operations - Hardware-level isolation of sensitive key material - Designed for use with cryptocurrency or other asymmetric cryptographic key management scenarios The card is targeted at individuals or organizations seeking a portable, hardware-enforced alternative to software-based key storage solutions. By keeping keys off internet-connected devices, it aims to eliminate a broad class of remote attack vectors associated with hot wallets or software keystores.