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Instead of only checking height to decide whether to disable script checks, actually check whether a block is an ancestor of a checkpoint, up to which headers have been validated. This means that we don't have to prevent accepting a side branch anymore - it will be safe, just less fast to do. We still need to prevent being fed a multitude of low-difficulty headers filling up our memory. The mechanism for that is unchanged for now: once a checkpoint is reached with headers, no headers chain branching off before that point are allowed anymore.
Zcash 1.0.6
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 blockchain 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.