SECURE TRANSACTION MANAGEMENT TECHNIQUES

Methods and apparatus for updating a non-volatile random access memory (NV-RAM) are provided. An exemplary method includes storing original data, such as secure transaction data, in a non-volatile memory (NVM) region of the NV-RAM and copying the original data to a random access memory (RAM) region of the NV-RAM. The method also includes computing updated data from the original data, storing the updated data in the RAM region, validating an updated flag in the RAM region, copying the updated data to the NVM region, and invalidating the updated flag in the RAM region. The method can also include determining, after an interruption, a status of the updated flag and, if the status of the updated flag is valid, then copying the updated data to the NVM region and invalidating the updated flag. The updated flag can indicate completion of a specific update stage in a plurality of update stages.