Method for Protection of a Non-Volatile RAM
Original Publication Date: 1988-Aug-01
Included in the Prior Art Database: 2005-Feb-15
A method for protecting the non-volatile RAM (NVRAM) storage included in a data processing system against erroneous writing operation is described. The method involves a procedure according to which the processor included in the data processing system may write data into the NVRAM only after an inflexible scheme of information exchange with its technical environment. If the writing operation does not comply with this peculiar scheme, the operation will be ineffective. Non-volatile RAM is widely used in modem data processing systems since they allow the storage of vital data, such as serial numbers, and the configuration parameters specific to each user and customer. The nature and the importance of data stored in NVRAM requires sophisticated means for ensuring their protection.