SNIP_CLASSIC_CRYPTO_SECTION_7_2_6_Key_Storage_in_NVM

7.2.6 Key Storage in NVM To allow a crypto driver to persist key elements in non-volatile memory, access to NVM is required. For this, the configuration of the crypto driver needs a reference to one or more NVM blocks. Keys with key elements that shall be persisted are to be assigned to these blocks. The elements that are to be persisted will then be written by the driver on validation and values are retrieved during initialization of the driver. The principal relation to configuration items is shown in Figure 7-2. Figure 7.2: NvBlock configuration for key persistence Important note: The crypto driver only deals with the functional operation to store data to and read data from an NVM block. Any error handling like defects of NVM blocks must be captured and dealt with in the application.