Apparatus and method for guaranteeing data integrity in real time, and black box system using thereof

The present invention relates to a vehicle black box technique, a real-time vehicle data integrity guarantee system according to one embodiment of the present invention, a data block division unit for dividing a block of data of the determined input data stream on the sensing information of the vehicle ahead size; IAD generator for generating an initial authentication data (IAD) by performing a signature by the signature key for the initial block of data of the input data stream; But generates a first hash value with respect to each of the divided block data sequentially, the first hash value with respect to the current block of data, by hashing, by connecting the first hash value relates to the value and immediately before the block data of the current block data a first hashing unit to generate; Creating a second hash value by hashing the first hash value with respect to the current block of data and includes a second hashing to the claim the two hash values ​​are output to the integrity verification data regarding the block data, wherein the first hashing unit , provides the advantage that supports the guarantees the integrity of the vehicle data as the first hash value and characterized by using the IAD value, stored in real time in the black box, as well as non-repudiation and error recovery on the first block of data do.