A national DNA database has been launched that will see genetic samples kept for all criminals who receive a sentence of five years or more.
The database is launched under the Criminal Justice (Forensic Evidence and DNA Database System) Act 2014, which was enacted today.
Similar databases already exist in the UK and many other European countries.
The genetic samples will be stored within Forensic Science Ireland, currently located at Garda headquarters in the Phoenix Park.
Former minister for justice Alan Shatter has welcomed the launch.
Speaking after its commencement, Mr Shatter said "the DNA database will provide enormous help to the gardaí and will revolutionise the investigation of crime in this State, in particular, homicides, rape and other sexual offences, assaults and burglaries".
"Based on experience elsewhere, DNA samples can help identify the perpetrators of up to 40% of all burglaries," he added.