Also could use "homomorphic encryption" [1] which allows you to perform arithmetic on encrypted data without decrypting it. [1] https://en.wikipedia.org/wiki/H

Also could use "homomorphic encryption" [1] which allows you to perform arithmetic on encrypted data without decrypting it. [1] https://en.wikipedia.org/wiki/Homomorphic_encryption https://en.wikipedia.org/wiki/Homomorphic_encryption