Microsoft says they completely beefed up the security on Xbox Live. General manager Alex Garden detailed some of the changes in a blog posted on Xbox.com.

One of the things he points out is that a lot of the changes are "dependent" on every Xbox Live member having updated security information. 

“I encourage everyone to take five minutes today to check your security information and update it if necessary,” he said. “If you have any lost or stolen security proofs, update them now to prevent any interruptions to your Xbox Live service in the future. We only use this information for your security, and never for marketing or advertising.”

Aside from that, he gave some great bullet points as to how Xbox Live was improved:

• We’ve taken legal action to pull down online posts of gamertags, usernames and passwords gathered from malware or phishing schemes to help protect our members.
• Our Xbox LIVE Spring update included many behind the scenes improvements that help us build on security enhancements for the near future.
• We’re sending unique codes to the security phone numbers and secondary email addresses provided by members to verify authorization for Xbox.com purchases or account change attempts not stemming from a member’s trusted device.
• We’re working to reduce market incentives for criminal activity. Engaging in identity theft, trading in stolen accounts and committing credit card fraud are illegal and violate our Terms of Use. Those involved in these activities risk criminal prosecution, account and console bans. That goes for both sellers and buyers of known stolen accounts and content.

If you want more details, hit the link below to the post. As for me, I'm not updating my information. I won't let The Man know where I am!