References

How can we improve the HSDir unpredictability design proposed in [SHAREDRANDOM]? See these references for discussion.

[SHAREDRANDOM-REFS]:
        https://gitweb.torproject.org/torspec.git/tree/proposals/250-commit-reveal-consensus.txt
        https://trac.torproject.org/projects/tor/ticket/8244

Scaling hidden services is hard. There are on-going discussions that you might be able to help with:

[SCALING-REFS]:
        https://lists.torproject.org/pipermail/tor-dev/2013-October/005556.html

How can hidden service addresses become memorable while retaining their self-authenticating and decentralized nature? See these references for some proposals; many more are possible.

[HUMANE-HSADDRESSES-REFS]:
        https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/ideas/xxx-onion-nyms.txt
        http://archives.seul.org/or/dev/Dec-2011/msg00034.html

Hidden Services are pretty slow. Both because of the lengthy setup procedure and because the final circuit has 6 hops. How can we make the Hidden Service protocol faster? See these references for some suggestions.

[PERFORMANCE-REFS]:
        "Improving Efficiency and Simplicity of Tor circuit
        establishment and hidden services" by Overlier, L., and
        P. Syverson

        [TODO: Need more here! Do we have any? :( ]

Other references:

[KEYBLIND-REFS]:
        https://trac.torproject.org/projects/tor/ticket/8106
        https://lists.torproject.org/pipermail/tor-dev/2012-September/004026.html

[KEYBLIND-PROOF]:
        https://lists.torproject.org/pipermail/tor-dev/2013-December/005943.html

[ATTACK-REFS]:
        "Trawling for Tor Hidden Services: Detection, Measurement,
        Deanonymization" by Alex Biryukov, Ivan Pustogarov,
        Ralf-Philipp Weinmann

        "Locating Hidden Servers" by Lasse Øverlier and Paul
        Syverson

[ED25519-REFS]:
        "High-speed high-security signatures" by Daniel
        J. Bernstein, Niels Duif, Tanja Lange, Peter Schwabe, and
        Bo-Yin Yang. http://cr.yp.to/papers.html#ed25519

[ED25519-B-REF]:
        https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03#section-5:

[PRNG-REFS]:
        http://projectbullrun.org/dual-ec/ext-rand.html
        https://lists.torproject.org/pipermail/tor-dev/2015-November/009954.html

[SRV-TP-REFS]:
        https://lists.torproject.org/pipermail/tor-dev/2016-April/010759.html

[VANITY-REFS]:
        https://github.com/Yawning/horse25519

[ONIONADDRESS-REFS]:
        https://lists.torproject.org/pipermail/tor-dev/2017-January/011816.html

[TORSION-REFS]:
        https://lists.torproject.org/pipermail/tor-dev/2017-April/012164.html
        https://getmonero.org/2017/05/17/disclosure-of-a-major-bug-in-cryptonote-based-currencies.html