Internet censorship in Vietnam prevents access to websites critical of the Vietnamese government, expatriate political parties, and international human rights organizations, among others. Online police reportedly monitor Internet cafes and cyber dissidents have been imprisoned. Vietnam regulates its citizens' Internet access using both legal and technical means. The government's efforts to regulate, monitor, and provide oversight regarding Internet use has been referred to as a "Bamboo Firewall".
The OpenNet Initiative classified the level of filtering in Vietnam as pervasive in the political, as substantial in the Internet tools, and as selective in the social and conflict/security areas in 2011, while Reporters without Borders considers Vietnam an "internet enemy".
While the government of Vietnam claims to safeguard the country against obscene or sexually explicit content through its blocking efforts, many of the filtered sites contain politically or religiously critical materials that might undermine the Communist Party's hold on power.Amnesty International reported many instances of Internet activists being arrested for their online activities.
Vietnam's Internet regulation commenced in large part as a result of the government's 1997 decree concerning Internet usage, wherein the General Director of the Postal Bureau (DGPT) was granted exclusive regulatory oversight of the Internet. As a result, the DGPT regulated every aspect of the Internet, including the registration and creation of Internet Service Providers, and the registration of individuals wishing to use the Internet through subscription contracts.
Regulatory responsibility for Internet material is divided along subject-matter lines with the Ministry of Culture and Information focusing on sexually explicit, superstitious, or violent content, while the Ministry of Public Security monitors politically sensitive content. Vietnam nominally guarantees freedom of speech, of the press, and of assembly through constitutional provisions, but state security laws and other regulations reduce or eliminate these formal protections in practice. All information stored on, sent over, or retrieved from the Internet must comply with Vietnam’s Press Law, Publication Law, and other laws, including state secrets and intellectual property protections. All domestic and foreign individuals and organizations involved in Internet activity in Vietnam are legally responsible for content created, disseminated, and stored. It is unlawful to use Internet resources or host material that opposes the state; destabilizes Vietnam’s security, economy, or social order; incites opposition to the state; discloses state secrets; infringes organizations’ or individuals’ rights; or interferes with the state’s Domain Name System (DNS) servers. Law on Information Technology was enacted in June 2006. Those who violate Internet use rules are subject to a range of penalties, from fines to criminal liability for offenses such as causing chaos or security order.