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Mr Assange said potential donors can now use monero and zcash as well as bitcoin and litecoin payment options in an attempt to sidestep a “financial blockade”.

He took to Twitter to complain about "politically induced financial censorship" that violated US donors’ First Amendment rights and their right to freedom of association.

Mr Assange, who has now spent eight years in exile in the Ecuadorian embassy in London, said: “US donors are the majority of our donor base.”