Richard is a network administrator working at a student loan company in Iowa. This company processes over 20,000 student loans a year from colleges all over the state. Most communication between the company, schools, and lenders is carried out through email. Because of privacy laws that are in the process of being implemented, Richard wants to get ahead of the game and become compliant before any sort of auditing occurs. Much of the email communication used at his company contains sensitive information such as social security numbers. For this reason, Richard wants to utilize email encryption agency-wide. The only problem for Richard is that his department only has a couple of servers, and they are utilized to their full capacity. Since a server- based PKI is not an option for him, he is looking for a low/no cost solution to encrypt email.

What should Richard use?