Protection Against Risk. During the trial, both the web-based intervention and the online assessment tool will be accessible to participants by password protection by an encrypted Internet connection via 128-bit (256-bit if available) Secure Sockets Layer (SSL), the e-commerce industry standard for securing communications on the World Wide Web. The server that houses the web-based prevention program will be protected behind two firewalls and physically secured in a locked cabinet. Administrative access (e.g., by the Server Administrator) to the machines will only occur using secure shell (SSH), a secure, encrypted protocol for remotely connecting to a machine. Servers will be backed up nightly to external hard drives using an encrypted file system. Additionally, the offsite back-up process encrypts critical data (using a 'FIPS' 140-2 certified encryption algorithm) and uploads that data to a private, secure Amazon S3 bucket (a generic "cloud computing" storage service offered by Amazon).