1. Estonia
2. AusCert. {n. d.}. Deprecation of SHA1 Certificates. Website (access on 2018-05-10). ({n. d.}). https://cs.auscert.org.au/news/deprecation-of-shal-certificates. AusCert. {n. d.}. Deprecation of SHA1 Certificates. Website (access on 2018-05-10). ({n. d.}). https://cs.auscert.org.au/news/deprecation-of-shal-certificates.
3. Autopsy. 2018. Autopsy - 3rd party modules. Website (access on 2018-05-10). (2018). https://wiki.sleuthkit.org/index.php?title=Autopsy_3rd_Party_Modules. Autopsy. 2018. Autopsy - 3rd party modules. Website (access on 2018-05-10). (2018). https://wiki.sleuthkit.org/index.php?title=Autopsy_3rd_Party_Modules.
4. Factoring RSA Keys from Certified Smart Cards: Coppersmith in the Wild
5. Digital signature law of the United Nations, European Union, United Kingdom and United States: Promotion of growth in E-commerce with enhanced security;Blythe Stephen E;Richmond Journal of Law & Technology,2005