A path-based watermarking embedder/extractor demo. gcc with 32-bit compatible and gdb with python are needed.
Use python embed.py <source> --msg <secret> to embed watermark and
gdb -x extract.py <binary> to extract it.
On extraction, the private key generated by embedder is required.
Reference: Collberg, Christian, et al. "Dynamic path-based software watermarking." ACM SIGPLAN Notices 39.6 (2004): 107-118.