Microchip does acknowledge that there are some overlaps in the types of applications that both CryptoMemory® and CryptoAuthentication™ can be used in. Here are some of the key differences between the two product offerings. First, CryptoMemory includes a faster 64-bit key algorithm, while CryptoAuthentication includes the standard SHA-256 algorithm. Second, CryptoMemory includes a range of EEPROM densities with very flexible security options. CryptoAuthentication has a small number of fuse bits for one-time programming. Third, CryptoMemory uses the industry standard I²C interface, and CryptoAuthentication uses a 1-wire interface. Finally, CryptoMemory is available in a variety of 8-lead plastic packages while CryptoAuthentication is available in the industry’s smallest 3-pin SOT23.