APPLICATION NOTE 2033 SRAM-Based Microcontroller Optimizes Security
Abstract
It is shown that nonvolatile (NV) SRAM is the most secure memory for storing secure data. By encrypting the memory with DES or triple DES, a cryptographic boundary can be erected that renders the secure information impervious to hackers. The volatile nature of the SRAM can be further protected by using tamper-reactive sensors that will erase the encryption keys as a response. Financial applications such as PINpads rely on the automatic program and data memory encryption features to secure data. The DS5250 is a high-performance, secure 8051 microcontroller that uses the unique properties of secure SRAM to protect sensitive data.
