Day 1,279: homomorphic
A possible answer is a technique called fully homomorphic encryption (fhe). This permits computation directly on encrypted data. Someone with the correct key could, using fhe, send information to a cloud, have it processed there, and get the results back without putting anything sensitive at risk.
Artwork of the day
Ecce homo
Ilya Repin
Original Title: Се, человек
Date: 1867
Style: Realism
Genre: religious painting
Word of the day
homomorphic: homomorphism is a structure-preserving map between two algebraic structures of the same type (such as two groups, two rings, or two vector spaces).
Quote of the day
“the kernel of a homomorphism is closed under addition, and also under multiplication by any element of the ring. These two properties define the notion of an ideal.”
― Timothy Gowers, The Princeton Companion to Mathematics