057ab6b4d1
Process verification keys to perform online verification
Checking proofs involves some arithmetic with pairings using components of the proof and the verification key. If you already have some curve points, like those in the verification key, you can amortize the cost of some of the more expensive arithmetic.
This PR adopts libsnark's precomputation of G2 elements in the verification key.
We *currently* call `r1cs_ppzksnark_verifier_strong_IC`:
```c++
template<typename ppT>
bool r1cs_ppzksnark_verifier_strong_IC(const r1cs_ppzksnark_verification_key<ppT> &vk,
const r1cs_ppzksnark_primary_input<ppT> &primary_input,
const r1cs_ppzksnark_proof<ppT> &proof)
{
enter_block("Call to r1cs_ppzksnark_verifier_strong_IC");
r1cs_ppzksnark_processed_verification_key<ppT> pvk = r1cs_ppzksnark_verifier_process_vk<ppT>(vk);
bool result = r1cs_ppzksnark_online_verifier_strong_IC<ppT>(pvk, primary_input, proof);
leave_block("Call to r1cs_ppzksnark_verifier_strong_IC");
return result;
}
```
Notice that this merely performs precomputation of the verification key, and then calls `r1cs_ppzksnark_online_verifier_strong_IC`. This PR merely performs the precomputation during verification key initialization, and calls that function directly.
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| .tx | ||
| build-aux/m4 | ||
| contrib | ||
| depends | ||
| doc | ||
| qa | ||
| share | ||
| src | ||
| zcutil | ||
| .gitattributes | ||
| .gitignore | ||
| .travis.yml | ||
| COPYING | ||
| INSTALL | ||
| Makefile.am | ||
| README.md | ||
| autogen.sh | ||
| code_of_conduct.md | ||
| configure.ac | ||
| libzcashconsensus.pc.in | ||
README.md
Zcash 1.0.2
What is Zcash?
Zcash is an implementation of the "Zerocash" protocol. Based on Bitcoin's code, it intends to offer a far higher standard of privacy through a sophisticated zero-knowledge proving scheme that preserves confidentiality of transaction metadata. Technical details are available in our Protocol Specification.
This software is the Zcash client. It downloads and stores the entire history of Zcash transactions; depending on the speed of your computer and network connection, the synchronization process could take a day or more once the block chain has reached a significant size.
Security Warnings
See important security warnings in doc/security-warnings.md.
Zcash is unfinished and highly experimental. Use at your own risk.
Where do I begin?
We have a guide for joining the main Zcash network: https://github.com/zcash/zcash/wiki/1.0-User-Guide
Need Help?
- See the documentation at the Zcash Wiki for help and more information.
- Ask for help on the Zcash forum.
Participation in the Zcash project is subject to a Code of Conduct.
Building
Build Zcash along with most dependencies from source by running ./zcutil/build.sh. Currently only Linux is officially supported.
License
For license information see the file COPYING.