The lower house of the Russian parliament has voted 325 to 1 to adopt the “Yarovaya law”, a package of amendments authored by the ruling United Russia party member Irina Yarovaya, who is known for previous legislative crackdowns on protesters and non-governmental organisations.

The legislation makes it a crime to not warn the authorities of “reliable” information about planned terrorist attacks, armed uprisings, hijacking and several other crimes. Expressing approval of terrorism on the internet will now be punishable with up to seven years in prison.

The legislation obliges telephone and internet providers to store records of all communications for six months and all metadata for three years, as well as help intelligence agencies decode encrypted messaging services.

The maximum punishment for extremism, a charge that has been increasingly brought against social media users critical of Russia’s involvement in Ukraine, will be increased from four to eight years in prison. Encouraging people to take part in “mass disturbances” will become a crime punishable by five to 10 years in prison.

Edward Snowden, a former NSA contractor who fled to Russia in 2013, lambasted the law as an expensive yet ineffective tool that will do little to protect Russians from terrorism.