Requires jurisdictions that maintain information about sex offenders to exempt from public disclosure any electronic mail address, instant message address, or other similar Internet identifier used by a sex offender.

Requires the Attorney General to maintain a system to allow commercial social networking websites to compare their databases of users to the Internet identifiers of persons in the National Sex Offender Registry. Exempts such websites from civil liability if compliant with the requirements of this Act.

Amends the federal criminal code to impose a fine and/or prison term: (1) of up to 10 years for failure by any sex offender to provide information required by this Act; and (2) of up to 20 years for age misrepresentation with the intent to use the Internet to engage in criminal sexual conduct with a minor.

Amends the federal criminal code to make it unlawful for any person who is required to register as a convicted sex offender to knowingly fail to provide online identifiers for inclusion in a sex offender registry. Imposes a fine and/or prison term of up to 10 years for violations.

Amends the Adam Walsh Child Protection and Safety Act of 2006 to expand the directive of the U.S. Sentencing Commission to promulgate sentencing guidelines for failure of a convicted sex offender to register in the National Sex Offender Registry to include failure to provide online identifiers.

(Sec. 3) Requires jurisdictions that maintain information about sex offenders to exempt from public disclosure any electronic mail address, instant message address, or other similar Internet identifier used by a sex offender.

Requires the Attorney General to maintain a system to allow commercial social networking websites to compare their databases of users to the Internet identifiers of persons in the National Sex Offender Registry, including for screening new users, for the purpose of protecting individuals from online sexual predators.

Prohibits the Attorney General from authorizing the release or dissemination of any Internet identifier contained in the National Sex Offender Registry except as explicitly provided for in this Act or for a necessary law enforcement purpose.

Exempts a commercial social networking website from civil claims in federal or state court arising from: (1) use of the National Sex Offender Registry unless such website engages in actual malice, intentional misconduct, or reckless disregard to a substantial risk of causing injury without legal justification; and (2) any decision not to compare its database with the online identifiers contained in the National Sex Offender Registry.

(Sec. 5) Imposes a fine and prison term of up to 20 years on any adults (age 18 or older) who knowingly misrepresent their age with the intent to use the Internet to engage in criminal sexual conduct with a minor who is at least four years younger.

(Sec. 6) Defines "possess" with respect to crimes of child sexual exploitation and child pornography to include accessing by computer visual depictions of child pornography with the intent to view.

(Sec. 7) Expands the jurisdictional bases for prosecutions of child sexual exploitation and child pornography crimes to include activities occurring in, affecting, or using any means or facility of, interstate or foreign commerce.

Amends the federal criminal code to make it unlawful for any person who is required to register as a convicted sex offender to knowingly fail to provide online identifiers for inclusion in a sex offender registry. Imposes a fine and/or prison term of up to 10 years for violations.

Amends the Adam Walsh Child Protection and Safety Act of 2006 to expand the directive of the U.S. Sentencing Commission to promulgate sentencing guidelines for failure of a convicted sex offender to register in the National Sex Offender Registry to include failure to provide online identifiers.

(Sec. 3) Requires jurisdictions that maintain information about sex offenders to exempt from public disclosure any electronic mail address or designation used for self-identification or routing in Internet communication or posting.

Requires the Attorney General to maintain a system available to social networking websites that permits the automated comparison of online identifiers in such websites to information contained in or derived from sex offender registries for the purpose of protecting the safety of users of such websites. Allows the Attorney General to control the number of searches allowed to a social networking website and to deny, suspend, or terminate the use of such system by a website.

Prohibits the Attorney General and social networking websites from releasing online identifiers to the public.

Exempts a commercial social networking website from civil claims in federal or state court arising from: (1) use of the National Sex Offender Registry unless such website engages in actual malice, intentional misconduct, or reckless disregard to a substantial risk of causing injury without legal justification; and (2) any decision not to compare its database with the online identifiers contained in the National Sex Offender Registry.

(Sec. 5) Imposes a fine and prison term of up to 20 years for intentional misrepresentation of age using the Internet or the mail for the purpose of coercing or enticing individuals, including minors, to engage in prostitution or other illicit sexual behavior.

(Sec. 6) Defines "possess" with respect to crimes of child sexual exploitation and child pornography to include accessing by computer visual depictions of child pornography with the intent to view.

(Sec. 7) Expands the jurisdictional bases for prosecutions of child sexual exploitation and child pornography crimes to include activities occurring in, affecting, or using any means or facility of, interstate or foreign commerce.

Requires the Attorney General to establish and maintain a secure system to allow social networking websites to compare information contained in the National Sex Offender Registry with the Internet identifiers of users of their websites. Allows social networking websites to use such system to conduct searches as frequently as the Attorney General may allow. Authorizes the Attorney General to deny, suspend, or terminate use of the system by a social networking website for misuse.

Prohibits the Attorney General and social networking websites from releasing to the public any list of the Internet identifiers of sex offenders.

Exempts a social networking website from civil claims in federal or state court arising from: (1) use of the National Sex Offender Registry unless such website engages in actual malice, intentional misconduct, or reckless disregard to a substantial risk of causing injury without legal justification; and (2) any decision not to compare its database with the online identifiers contained in the National Sex Offender Registry.

Amends the Adam Walsh Child Protection and Safety Act of 2006 to revise the minimum standards, under a pilot program, for electronic monitoring of sex offenders to eliminate requirements that the tracking device: (1) contain cellular technology in a single unit; and (2) provide two- and three-way voice communication.

Keeping the Internet Devoid of Sexual Predators Act of 2008 or the KIDS Act of 2008 - Directs the Attorney General to: (1) require sex offenders to provide to the National Sex Offender Registry all Internet identifiers (i.e., email addresses and other designations used for self-identification or routing in Internet communication or posting) used by such offenders; (2) specify requirements for keeping Internet identifier information current; (3) exempt Internet identifiers provided by a sex offender from public disclosure; and (4) establish procedures to notify sex offenders of changes in requirements for providing Internet identifier information.

Requires the Attorney General to establish and maintain a secure system to allow social networking websites to compare information contained in the National Sex Offender Registry with the Internet identifiers of users of their websites. Allows social networking websites to use such system to conduct searches as frequently as the Attorney General may allow. Authorizes the Attorney General to deny, suspend, or terminate use of the system by a social networking website for misuse.

Prohibits the Attorney General and social networking websites from releasing to the public any list of the Internet identifiers of sex offenders.

Exempts a social networking website from civil claims in federal or state court arising from: (1) use of the National Sex Offender Registry unless such website engages in actual malice, intentional misconduct, or reckless disregard to a substantial risk of causing injury without legal justification; and (2) any decision not to compare its database with the online identifiers contained in the National Sex Offender Registry.

Amends the Adam Walsh Child Protection and Safety Act of 2006 to revise the minimum standards, under a pilot program, for electronic monitoring of sex offenders to eliminate requirements that the tracking device: (1) contain cellular technology in a single unit; and (2) provide two- and three-way voice communication.