Revisit communication security

[earaujoassis]

Resources:

• http://stackoverflow.com/questions/2392100/how-to-prevent-csrf-in-a-restful-application
• https://www.owasp.org/index.php/Cross-Site_Request_Forgery_(CSRF)_Prevention_Cheat_Sheet
• http://security.stackexchange.com/questions/20129/how-and-when-do-i-use-hmac
• http://billpatrianakos.me/blog/2015/06/09/simple/
• https://elithrar.github.io/article/preventing-csrf-attacks-in-go/