'The will is supposed to be filed with the court for "safekeeping" and is a public record. However, if there was also a trust, the will is likely to give everything to the trust . This is called a pourover will. As a named beneficiary, you were entitled to receive a copy of the trust, and it sounds like you have. There is no requirement that these documents be signed on each page, but the will (unless holographic) needs to be witnessed, and the witnesses names and addresses appear on the last page. The trust does not need to be witnessed but is often notarized, especially if the trust contains real estate. If you think there was undue influence, or that he was incapacitated at the time, you can ask a court to determine the validity of the documents. You will need an attorney to bring that action.'

https://www.avvo.com/legal-answers/are-wills-and-trust-filed-in-california-if-so-wher-284090.html

you can put private key into trust. (you can see above it'll be copied and this stuff) But it's easy to find a way based on this