New Hampshire's "revenge porn" law is RSA 644:9-a, Nonconsensual dissemination of private sexual images. The law went into effect July 19, 2016. A more accurate term than "revenge porn" is "nonconsensual pornography" (NCP): the sharing of private sexual images without consent. In addition to RSA 644:9-a there are other, related laws that could be violated when sharing these private images including: child pornography, unlawful surveillance, dissemination of video and images obtained through unlawful surveillance, sexual assault, aggravated harassment, domestic violence, cyber-stalking, stalking, extortion, and hacking.
Federal legislation has been proposed but has not (as of the date of this post) been enacted into law.
Please remember that this guide is for information purposes only and is not comprehensive. It is intended as a starting point for research, to illustrate the various sources of the law, and to provide guidance in their use. NH Law About ... is not a substitute for the services of an attorney.