MPs have called for a temporary ban on political parties receiving donations in cryptocurrencies over concerns about foreign interference in British democracy.
Foreign donations are already banned in the UK and the government is planning to tighten up the rules to increase transparency.
But anti-corruption campaigners have warned that crypto donations - which are currently legal - could be used to disguise the source of money.
Parliament's joint committee on the national security strategy has written to the government to demand a temporary halt to crypto donations until tighter regulations can be developed.