The website and underlying database are hosted by DreamHost, with state-of-the art security.
The entire database is backed up daily onto three different servers, two hosted by Dreamhost, a third by the University of Pennsylvania.
Connections between you and the server are encrypted (https), meaning that even if you use an open unprotected WiFi network, other users cannot see what you receive or send to AsPredicted.org.
There are no accounts, userids nor passwords. All identification is done via email. When requested, a link that logs users in is emailed, the link works once, and users remain logged in through a cookie
until they actively logout. When logging out users are informed if they are logged in on a different browser and given the option to log-out remotely.
Data on the server, at least for now, are not encrypted. If hackers break into DreamHost and find the AsPredicted database, they would have access to the pre-registration information. Having said that, the data on the
server are probably safer than in your personal computer.