Cryptologist Adi Shamir invented a method for dividing data into encrypted parts, where possession of some number of parts will permit deciphering of the data. So if there are 5 parts, then 3 might decode the data.

This method can be used to distribute the HRC tape, so that no one (who does not decypher) has legal liability.

https:// en.wikipedia.org/wiki/Shamir%27s_Secret_Sharing