Method for verifying digital signatures, vehicle computing unit and vehicle

Abstract

Digital signatures are verified by applying a hash function to data stored in a flash memory to generate a signature. For each written-to block of the flash memory, a hash is calculated from the data written to the respective block by a memory controller of the flash memory and stored together with the data in the block. The memory controller calculates a verification hash by applying a hash function to a hash stored in a block. A system superordinate to the flash memory reads a hash stored in a block and the verification hash for the blocks for which the signature is to be verified, calculates a check hash by applying a hash function to at least the one read-out hash, compares the calculated check hash with the read-out verification hash, and confirms the signature if the check hash matches the verification hash.