diff --git a/text/bibliography.bib b/text/bibliography.bib
index 0eb4fca..e190cfe 100644
--- a/text/bibliography.bib
+++ b/text/bibliography.bib
@@ -17,7 +17,7 @@
 @online{acxiom,
   title = {Acxiom},
   url   = {https://acxiom.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @book{adler2010geometry,
@@ -268,7 +268,7 @@
   year         = {2016},
   publisher    = {Chambers and Partners},
   howpublished = {\url{https://chambersandpartners.com/article/713/personal-data-the-new-oil-of-the-digital-economy}},
-  note         = {Accessed on December 1, 2019}
+  note         = {Accessed on October 11, 2021}
 }
 
 @article{chan2011private,
@@ -299,7 +299,7 @@
   publisher    = {Channel 4},
   year         = {2018},
   howpublished = {\url{https://channel4.com/news/data-democracy-and-dirty-tricks-cambridge-analytica-uncovered-investigation-expose}},
-  note         = {Accessed on December 1, 2019}
+  note         = {Accessed on October 11, 2021}
 }
 
 @inproceedings{chatzikokolakis2015geo,
@@ -548,7 +548,7 @@
   publisher    = {The Economist},
   year         = {2016},
   howpublished = {\url{https://economist.com/leaders/2017/05/06/the-worlds-most-valuable-resource-is-no-longer-oil-but-data}},
-  note         = {Accessed on December 1, 2019}
+  note         = {Accessed on October 11, 2021}
 }
 
 @inproceedings{efthymiou2015big,
@@ -598,13 +598,13 @@
 @online{experian,
   title = {Experian},
   url   = {https://experian.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @online{facebook,
   title = {Facebook},
   \url  = {https://facebook.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @inproceedings{fan2013differentially,
@@ -646,7 +646,7 @@
 @online{foursquare,
   title = {Foursquare},
   url   = {https://foursquare.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @misc{franceschi-bicchierairussell2015redditor,
@@ -655,7 +655,7 @@
   year         = {2015},
   publisher    = {Mashable},
   howpublished = {\url{https://mashable.com/2015/01/28/redditor-muslim-cab-drivers}},
-  note         = {Accessed on July 1, 2020}
+  note         = {Accessed on October 11, 2021}
 }
 
 @book{fuller2009introduction,
@@ -751,7 +751,7 @@
 @online{gmaps,
   title = {Google Maps},
   url   = {https://google.com/maps},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @article{goldreich1998secure,
@@ -1345,7 +1345,7 @@
 @online{osm,
   title = {OpenStreetMap},
   url   = {https://openstreetmap.org},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @article{ou2018optimal,
@@ -1456,7 +1456,7 @@
 @online{ring,
   title = {Ring},
   url   = {https://ring.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @book{rogers2000diffusions,
@@ -1473,7 +1473,7 @@
   year         = {2018},
   publisher    = {TechCrunch},
   howpublished = {\url{https://techcrunch.com/2018/01/28/strava-exposes-military-bases}},
-  note         = {Accessed on July 1, 2020}
+  note         = {Accessed on October 11, 2021}
 }
 
 @inproceedings{samarati1998protecting,
@@ -1667,19 +1667,19 @@
 @online{tousanticovid,
   title = {TousAntiCovid},
   url   = {https://bonjour.tousanticovid.gouv.fr},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @online{transunion,
   title = {TransUnion},
   url   = {https://transunion.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @online{twitter,
   title = {Twitter},
   url   = {https://twitter.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @inproceedings{varghese2016challenges,
@@ -1813,7 +1813,7 @@
 @online{waze,
   title = {Waze},
   url   = {https://waze.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @incollection{wei2006time,
@@ -1844,7 +1844,7 @@
 @online{wiki,
   title = {Wikipedia},
   url   = {https://wikipedia.com},
-  year  = {Accessed on November 11, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @misc{wired2014data,
@@ -1853,7 +1853,7 @@
   year         = {2014},
   publisher    = {Wired},
   howpublished = {\url{https://wired.com/insights/2014/07/data-new-oil-digital-economy}},
-  note         = {Accessed on December 1, 2019}
+  note         = {Accessed on October 11, 2021}
 }
 
 @misc{wolfgang1999stochastic,
@@ -1904,7 +1904,7 @@
 @online{xssfopes2020tweet,
   title = {{@xssfopes: ``can anyone spot the issue with the algo? red is original data point, 400 ``anonymized'' data points calculated''}},
   url   = {https://twitter.com/xssfox/status/1251116087116042241},
-  year  = {Accessed on July 16, 2020}
+  year  = {Accessed on October 11, 2021}
 }
 
 @inproceedings{yang2015bayesian,