The UK’s National Cyber Security Centre just released its white paper on “Advanced Cryptography,” which it defines as “cryptographic techniques for processing encrypted data, providing enhanced functionality over and above that provided by traditional cryptography.” It includes things like homomorphic encryption, attribute-based encryption, zero-knowledge proofs, and secure multiparty computation. It’s full of good advice. I especially appreciate this warning: When deciding whether to use Advanced Cryptography, start with a clear articulation of the problem, and use that to guide the development of an appropriate solution. That is, you should not start with an Advanced Cryptography technique, and then attempt to fit the functionality it provides to the problem. ...

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The UK’s National Cyber Security Centre (NCSC) has released a white paper on 'Advanced Cryptography', detailing cryptographic techniques such as homomorphic encryption and zero-knowledge proofs. It emphasizes the importance of clearly defining a problem before adopting advanced cryptographic solutions and warns against designing one's own cryptographic implementations due to complexity. The paper notes potential benefits and challenges, including immaturity of techniques, computational burdens, and additional attack risks, while acknowledging ongoing efforts to improve efficiency and standardize implementations.

NCSC Guidance on “Advanced Cryptography”