Looks like some parts of the whitepaper are copied from this: http://www.dtic.mil/dtic/tr/fulltext/u2/a540835.pdf

In particular, Figure 2 of the whitepaper is Figure 8 of the paper I linked. And much of section 4 whitepaper are directly copied. For instance, these sentences appear in both documents:

"The prover (P) chooses randomly an isomorphism PI to permute the G and then sends a commitment to this new graph PI(G)..."
"The permutations used by the prover are unnecessary information for the verifier, as checking that the edges revealed form a path is a simple task
without the knowledge of the permutations"

This is pretty disappointing.