Uh, no. An individual is not required to assist in a search of their own papers. They can have my phone. I'll buy a new one. Good luck cracking the code.
Actually, the courts can order the production of documents, evidence, etc., how ever the required demanded items are stored or are placed: under lock and key, in a safe, encrypted, hidden away, etc. If the custodian of those documents, even the person who owns them, who has been presented with the search warrant, refuses to provide them, i.e. unlock the storage, if it is within his power to do so, the courts can lock him up until he complies with the court's order, under contempt of court laws.