Current command:
lf em 4x70 recover --help
After obtaining key bits 95..48 (such as via 'lf em 4x70 brute'), this command will recover key bits 47..00. By default, this process does NOT require a tag to be present. By default, the potential keys are shown (typically 1-6) along with a corresponding 'lf em 4x70 auth' command that will authenticate, if that potential key is correct. The user can copy/paste these commands when the tag is present to manually check which of the potential keys is correct. usage: lf em 4x70 recover [-h] [--par] -k <hex> --rnd <hex> --frn <hex> --grn <hex> options: -h, --help This help --par Add parity bit when sending commands -k, --key <hex> Key as 6 hex bytes --rnd <hex> Random 56-bit --frn <hex> F(RN) 28-bit as 4 hex bytes --grn <hex> G(RN) 20-bit as 3 hex bytes examples/notes: lf em 4x70 recover --key F32AA98CF5BE --rnd 45F54ADA252AAC --frn 4866BB70 --grn 9BD180 (pm3 test key) lf em 4x70 recover --key A090A0A02080 --rnd 3FFE1FB6CC513F --frn F355F1A0 --grn 609D60 (research paper key)