Applications: zcash and anonymity in cryptocurrencies

[dbosk]

We need to add:

• Videos/papers showing why Bitcoin provides no anonymity.
• Add a good video on how Zcash works?

[dbosk]

Status Review (January 2026)

Branch state: 73 commits behind master, last activity February 2022.

What's done:

• Added video link on Zcash anonymity to applications/lms.md
• Added video on website fingerprinting with oracles
• Added video on Tor

What's missing (from PR description):

• Videos/papers showing why Bitcoin provides no anonymity
• Add a good video on how Zcash works

Recommendation:

This PR is ~4 years stale. Consider either:

1. Closing if Zcash content is no longer planned for the course
2. Rebasing and completing if still relevant

The branch has only 1 unique commit with 23 lines of changes, so the content could easily be recreated if needed.