Update on Overleaf.

ccs-sample.bib

@@ -0,0 +1,33 @@
+@article{nakamoto2008bitcoin,
+  title={Bitcoin: A peer-to-peer electronic cash system},
+  author={Nakamoto, Satoshi},
+  journal={Decentralized Business Review},
+  pages={21260},
+  year={2008}
+}
+
+@inproceedings{kiayias2021mining,
+  title={Mining in Logarithmic Space},
+  author={Kiayias, Aggelos and Leonardos, Nikos and Zindros, Dionysis},
+  booktitle={Proceedings of the 2021 ACM SIGSAC Conference on Computer and Communications Security},
+  pages={3487--3501},
+  year={2021}
+}
+
+@inproceedings{garay2015bitcoin,
+  title={The bitcoin backbone protocol: Analysis and applications},
+  author={Garay, Juan and Kiayias, Aggelos and Leonardos, Nikos},
+  booktitle={Annual international conference on the theory and applications of cryptographic techniques},
+  pages={281--310},
+  year={2015},
+  organization={Springer}
+}
+
+@inproceedings{garay2017bitcoin,
+  title={The bitcoin backbone protocol with chains of variable difficulty},
+  author={Garay, Juan and Kiayias, Aggelos and Leonardos, Nikos},
+  booktitle={Annual International Cryptology Conference},
+  pages={291--323},
+  year={2017},
+  organization={Springer}
+}