Homomorphic encryption allows you to modify the encrypted data without decrypting it or even knowing the the content. I don’t think this is homomorphic encryption.
If they are able to do this without decrypting the data then I think you could describe this as a somewhat week encryption that exposes some data attributes as queryable. You could not implement this with strong encryption without at least decrypting for indexing.
If they are able to do this without decrypting the data then I think you could describe this as a somewhat week encryption that exposes some data attributes as queryable. You could not implement this with strong encryption without at least decrypting for indexing.