Government can't force ME to decrypt hand written notes, but that falls under the rights against self-incrimination. Totally different.
Government cannot force me to open a safe, but they can get an order to drill or blast open the safe.
i am not saying that the government should be able to force individuals to make it easier to obtain evidence against them. However, they should have access to search everything. It is very dangerous for a company to be able to manufacture a VERY common device which can be used to store criminal evidence to where the person storing it has certainty that it can never be breached.