The apparatus for securely updating the binary data in the vehicle includes a plurality of nodes that transmit/receive block data to/from each other through a wireless network. Each of the plurality of nodes includes a data reception unit that receives block data from another node, a data verification unit that compares the block data received from the another node with previously stored block data, a data correction unit that deletes the block data, or combines the block data with the previously stored block data and encrypts the combined block data to generate corrected block data, a data storage unit that stores the corrected block data, and a data transmission unit that transmits the corrected block data to another node.