...
https://venkatsadasivam.com/2009/08/29/single-sign-on-in-java-platform/
http://docs.spring.io/spring-security-kerberos/docs/1.0.1.RELEASE/reference/htmlsingle/
https://tomcat.apache.org/tomcat-8.0-doc/windows-auth-howto.html
http://docs.oracle.com/javase/jndi/tutorial/ldap/security/gssapi.html
http://docs.oracle.com/javase/8/docs/technotes/guides/security/jgss/lab/part1.html#PART1
https://docs.oracle.com/cd/E23943_01/web.1111/e13707/sso.htm#SECMG481
https://stackoverflow.com/questions/25289231/using-gssmanager-to-validate-a-kerberos-ticket