This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
HTTPS is secure. The data exchanged between you and the server is encrypted; if intercepted, no one will be able to understand it. But beware: HTTPS doesn't protect ports; if the server/client has security lacks, the data may be endangered by it. Think of HTTPS as the "security van".