The ATSHA204A-RBHCZ-B is a secure authentication IC from Microchip that is a low-cost, secure, and easy-to-use solution for a variety of secure authentication and cryptographic needs. This part offers a complete crypto-system on a monolithic chip. It features a wide range of cryptographic modes, including ECC-P256, SHA-256, SHA-384, and SHA-512. This makes it ideal for applications such as digital signature verification, secure boot, secure firmware updates, secure transactions, and other secure operations. It also provides a variable-length key store, making it very versatile. Additionally, it incorporates countermeasures against power analysis, voltage glitching, and data-line glitches, providing excellent security for embedded systems.