According to a statement by the Press Secretary on October 13, 2008 President George W. Bush signed into law two acts.  One entitled:  "Keeping the Internet Devoid of Sexual Predators Act of 2008," and the other "Protect Our Children Act of 2008."   Read the full text "Keeping the Internet Devoid of Sexual Predators Act of 2008."

Here is an excerpt from the S. 431:
S. 431: Keeping the Internet Devoid of Sexual Predators Act of 2008
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(2) OF 'INTERNET IDENTIFIERS'- As used in this Act, the term 'Internet identifiers' means electronic mail addresses and other designations used for self-identification or routing in Internet communication or posting.
 
Because of this law registered sex offenders are required to provide "internet identifiers," such as e-mail addresses and other designations used for self-identification to the Sex Offender Registries.
 
According to the statement by Press Secretary dated October 13, 2008, the next Bill S.1738 entitled:  "Protect Our Children Act of 2008" requires the Department of Justice to create and implement a national strategy for prevention of child exploitation.  Read more at S. 1738