diff --git a/references.bib b/references.bib
index 40e95c1..5487eaf 100644
--- a/references.bib
+++ b/references.bib
@@ -106,7 +106,7 @@
 	booktitle = {European Symposium on Security \& Privacy},
 	publisher = {IEEE},
 	year = {2017},
-	url = {http://homes.cs.washington.edu/~yoshi/papers/GebhartEtAl-IEEEEuroSP.pdf},
+	url = {https://homes.cs.washington.edu/~yoshi/papers/GebhartEtAl-IEEEEuroSP.pdf},
 }
 
 @techreport{Wolfgarten2006a,
@@ -151,7 +151,7 @@
 	booktitle = {Workshop on Privacy in the Electronic Society},
 	publisher = {ACM},
 	year = {2016},
-	url = {http://dl.acm.org/authorize?N25517},
+	url = {https://dl.acm.org/authorize?N25517},
 }
 
 @inproceedings{Bocovich2016a,
@@ -447,7 +447,7 @@
 	booktitle = {Workshop on Privacy in the Electronic Society},
 	publisher = {ACM},
 	year = {2011},
-	url = {http://www.cypherpunks.ca/~iang/pubs/bridgespa-wpes.pdf},
+	url = {https://www.cypherpunks.ca/~iang/pubs/bridgespa-wpes.pdf},
 }
 
 @inproceedings{Ververis2015a,
@@ -598,7 +598,7 @@
 	publisher = {CTU Publishing House},
 	title = {The {Eternity} Service},
 	year = {1996},
-	url = {http://www.cl.cam.ac.uk/~rja14/Papers/eternity.pdf},
+	url = {https://www.cl.cam.ac.uk/~rja14/Papers/eternity.pdf},
 }
 
 @techreport{Anderson2012a,
@@ -606,7 +606,7 @@
 	title = {The Hidden {Internet} of {Iran}: Private Address Allocations on a National Network},
 	institution = {},
 	year = {2012},
-	url = {http://arxiv.org/pdf/1209.6398v1},
+	url = {https://arxiv.org/pdf/1209.6398v1},
 }
 
 @techreport{Anderson2013a,
@@ -614,7 +614,7 @@
 	title = {Dimming the {Internet}: Detecting Throttling as a Mechanism of Censorship in {Iran}},
 	institution = {University of Pennsylvania},
 	year = {2013},
-	url = {http://arxiv.org/pdf/1306.4361v1.pdf},
+	url = {https://arxiv.org/pdf/1306.4361v1.pdf},
 }
 
 @inproceedings{Anderson2014a,
@@ -665,7 +665,7 @@
 	title = {``Good'' Worms and Human Rights},
 	volume = {38},
 	year = {2008},
-	url = {http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1412007},
+	url = {https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1412007},
 }
 
 @techreport{Bachrach2011a,
@@ -673,7 +673,7 @@
 	title = {{\#h00t}: Censorship Resistant Microblogging},
 	institution = {Rice University and University of Texas at Arlington},
 	year = {2011},
-	url = {http://arxiv.org/pdf/1109.6874v1.pdf},
+	url = {https://arxiv.org/pdf/1109.6874v1.pdf},
 }
 
 @inproceedings{Benson2013a,
@@ -709,7 +709,7 @@
 	publisher = {USENIX},
 	title = {Chipping Away at Censorship Firewalls with User-Generated Content},
 	year = {2010},
-	url = {http://www.usenix.org/event/sec10/tech/full_papers/Burnett.pdf},
+	url = {https://www.usenix.org/event/sec10/tech/full_papers/Burnett.pdf},
 }
 
 @inproceedings{Cao2009a,
@@ -747,7 +747,7 @@
 	publisher = {Springer},
 	title = {Ignoring the {Great Firewall} of {China}},
 	year = {2006},
-	url = {http://www.cl.cam.ac.uk/~rnc1/ignoring.pdf},
+	url = {https://www.cl.cam.ac.uk/~rnc1/ignoring.pdf},
 }
 
 @inproceedings{Clayton2006b,
@@ -757,7 +757,7 @@
 	publisher = {Springer},
 	title = {Failures in a Hybrid Content Blocking System},
 	year = {2006},
-	url = {http://www.cl.cam.ac.uk/~rnc1/cleanfeed.pdf},
+	url = {https://www.cl.cam.ac.uk/~rnc1/cleanfeed.pdf},
 }
 
 @inproceedings{Connolly2014a,
@@ -803,7 +803,7 @@
 	booktitle = {Economics and Information Security},
 	title = {The Economics of Censorship Resistance},
 	year = {2004},
-	url = {http://www.cl.cam.ac.uk/~rja14/Papers/redblue.pdf},
+	url = {https://www.cl.cam.ac.uk/~rja14/Papers/redblue.pdf},
 }
 
 @techreport{Danezis2011a,
@@ -846,7 +846,7 @@
 	booktitle = {Computer and Communications Security},
 	year = {2013},
 	publisher = {ACM},
-	url = {http://eprint.iacr.org/2012/494.pdf},
+	url = {https://eprint.iacr.org/2012/494.pdf},
 }
 
 @inproceedings{Ensafi2014a,
@@ -855,7 +855,7 @@
 	booktitle = {Passive and Active Measurement Conference},
 	publisher = {Springer},
 	year = {2014},
-	url = {http://arxiv.org/pdf/1312.5739.pdf},
+	url = {https://arxiv.org/pdf/1312.5739.pdf},
 }
 
 @inproceedings{Espinoza2011a,
@@ -1148,7 +1148,7 @@
 	booktitle = {Computer and Communications Security},
 	year = {2012},
 	publisher = {ACM},
-	url = {http://www.cypherpunks.ca/~iang/pubs/skypemorph-ccs.pdf},
+	url = {https://www.cypherpunks.ca/~iang/pubs/skypemorph-ccs.pdf},
 }
 
 @inproceedings{Morrison2014a,
@@ -1156,7 +1156,7 @@
 	title = {Toward automatic censorship detection in microblogs},
 	booktitle = {Data Mining in Social Networks},
 	year = {2014},
-	url = {http://arxiv.org/pdf/1402.5310.pdf},
+	url = {https://arxiv.org/pdf/1402.5310.pdf},
 }
 
 @inproceedings{Nabi2013a,
@@ -1184,7 +1184,7 @@
 	publisher = {IEEE},
 	title = {Empirical Study of a National-Scale Distributed Intrusion Detection System: Backbone-Level Filtering of {HTML} Responses in {China}},
 	year = {2010},
-	url = {http://www.cs.unm.edu/~crandall/icdcs2010.pdf},
+	url = {https://www.cs.unm.edu/~crandall/icdcs2010.pdf},
 }
 
 @inproceedings{Perng2005a,
@@ -1231,7 +1231,7 @@
 	title = {Identity-Based Steganography and Its Applications to Censorship Resistance},
 	publisher = {Springer},
 	year = {2013},
-	url = {http://petsymposium.org/2013/papers/ruffing-censorship.pdf},
+	url = {https://petsymposium.org/2013/papers/ruffing-censorship.pdf},
 }
 
 @inproceedings{Schuchard2012a,
@@ -1403,7 +1403,7 @@
 	booktitle = {Network and Distributed System Security},
 	publisher = {The Internet Society},
 	year = {2009},
-	url = {http://www.icsi.berkeley.edu/pubs/networking/ndss09-resets.pdf},
+	url = {https://www.icsi.berkeley.edu/pubs/networking/ndss09-resets.pdf},
 }
 
 @inproceedings{Weinberg2012a,
@@ -1464,7 +1464,7 @@
 	title = {Regional Variation in {Chinese Internet} Filtering},
 	institution = {University of Oxford},
 	year = {2012},
-	url = {http://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID2265775_code1448244.pdf?abstractid=2265775&mirid=3},
+	url = {https://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID2265775_code1448244.pdf?abstractid=2265775&mirid=3},
 }
 
 @inproceedings{Wustrow2011a,
@@ -1473,7 +1473,7 @@
 	booktitle = {USENIX Security Symposium},
 	publisher = {USENIX},
 	year = {2011},
-	url = {http://www.usenix.org/event/sec11/tech/full_papers/Wustrow.pdf},
+	url = {https://www.usenix.org/event/sec11/tech/full_papers/Wustrow.pdf},
 }
 
 @inproceedings{Wustrow2014a,
@@ -1492,7 +1492,7 @@
 	publisher = {Springer},
 	year = {2011},
 	pages = {133--142},
-	url = {http://web.eecs.umich.edu/~zmao/Papers/china-censorship-pam11.pdf},
+	url = {https://web.eecs.umich.edu/~zmao/Papers/china-censorship-pam11.pdf},
 }
 
 @inproceedings{Zhou2013a,
@@ -1501,7 +1501,7 @@
 	booktitle = {Hot Topics in Privacy Enhancing Technologies},
 	publisher = {Springer},
 	year = {2013},
-	url = {http://petsymposium.org/2013/papers/zhou-censorship.pdf},
+	url = {https://petsymposium.org/2013/papers/zhou-censorship.pdf},
 }
 
 @inproceedings{Zhu2013a,