On 4 December 2003, Hungary became the fourth country (along with Albania, Croatia and Estonia) to ratify the Cybercrime Convention. Lithuania is the latest country to have signed the Convention (26 June 2003). All 15 EU states have already signed it.
Hungary made an explicit reservation, reserving the right not to apply Article 9, paragraph 2, sub-paragraph b. This means they won't consider a photo to be child pornography if the person depicted only appears to be under 18, but is in fact older.
To enter into force, the Cybercrime Treaty only needs 1 more ratification from a CoE country.
COE overview signatures treaties
http://www.coe.int/T/e/Com/Press/Convention/default.asp