Children fear their home addresses could fall into the hands of paedophiles under a new Government database containing details for every child in England, a report has warned.
Dr Roger Morgan, the children's rights director, found widespread concerns that sensitive information on the £224 million computer system could be vulnerable to security breaches.
He urged ministers to keep security for the new ContactPoint database under constant review.
The report followed the major security breach at HM Revenue and Customs in which computer discs containing personal records for 25 million people went missing.
Dr Morgan, who is based at Ofsted, said: "The children have told me that they are concerned about the safety of ContactPoint.
"Children want to be assured that their information will remain safe and confidential and have asked specifically that the Government will never in the future put a child's photograph or telephone number on the database.
"The Government has undertaken to listen to the children's views and concerns.
"There will always be a need to keep security under review, as the repercussions of information falling into the wrong hands could be extremely dangerous."
ContactPoint will be a new computerised list of every child in England. It will contain details for each child including their name, address, date of birth, contact details for parents, details of school, doctor and professionals working with the child.
The aim is that social workers, doctors and schools will share information on young people to stop children falling into gaps between different services.
