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+<a id="rend-spec-v3.txt-7"></a>
+
+# References
+
+How can we improve the HSDir unpredictability design proposed in
+\[SHAREDRANDOM\]? See these references for discussion.
+
+```text
+[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:
+
+```text
+[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.
+
+```text
+[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.
+
+```text
+[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:
+
+```text
+[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
+```