The government is allowed to crack open a safe with a warrant. The government is allowed to crack open an iPhone with a warrant. What does either of those thin

The government is allowed to crack open a safe with a warrant. The government is allowed to crack open an iPhone with a warrant. What does either of those things have to do with decrypting things found inside either the safe or the iPhone? If the FBI found coded papers inside a safe, they could try to decrypt those papers, but couldn't compel the owner to assist them. Security flaws are fair game for law enforcement. Secure encryption without exploitable weaknesses will probably defeat them even in the presence of a court order.