If you want to assure that your data is secure “at rest”, in 2018, you have a bunch of widely known and well-tested industry standards available on the market – such as symmetric/asymmetric cryptography, data vaults like keychain etc. But all these ideas struggle from threat called a single point of failure – if your master key is accessed by anyone, all data can be accessed in unencrypted form. How to mitigate this issue? Here is where Shamir’s Secret Sharing Scheme (referred later as SSSS) come into use.