Samsung: Binary Check Code

| Step | Byte | XOR result | +1 (mod 256) | |------|------|------------|---------------| | 0 | – | 0 | – | | 1 | 0x12 | 0x12 | 0x13 | | 2 | 0x34 | 0x27 (0x13⊕0x34) | 0x28 | | 3 | 0x56 | 0x7E (0x28⊕0x56) | 0x7F | | 4 | 0x78 | 0x07 (0x7F⊕0x78) | 0x08 |

return bcc;

dd if=firmware.bin bs=1 skip=0 count=1024 > data.bin # extract data ./bcc_calc data.bin # compute BCC Samsung Binary Check Code is a lightweight, proprietary error detection mechanism optimized for embedded systems. While it offers no security guarantees, it serves its purpose efficiently in boot validation and memory integrity checks. Engineers reverse-engineering Samsung firmware or developing compatible tools must identify the correct BCC variant (seed, final operation) for the target device. samsung binary check code