-- A Swiss whistleblower plans to hand over the "offshore banking secrets of the rich and famous" to WikiLeaks, the website dedicated to revealing secrets said.

Rudolf Elmer, who describes himself as an activist/reformer/banker, is due to hand over the papers at a press conference in London Monday.

Elmer aims to "challenge Swiss Bank Secrecy at the European Court of Human Rights and the Swiss courts," he says on his website. He has worked at six offshore banking centers, he says.

Elmer and WikiLeaks founder Julian Assange worked together on a complaint against Swiss banking secrecy at the European Court of Human Rights in 2008.