The Cramium Personal Hardware Security Module (PHSM) is an advanced security solution from CrossBar designed for safeguarding digital assets, including cryptocurrency keys. Built on the robust Cramium Security Processing Unit (SPU) family, the PHSM is a compact, versatile hardware wallet performing cryptographic operations securely within its secure element. Its single-chip architecture supports Zero-Knowledge Proof without revealing key shares and remains offline when not operational, increasing its security profile.