Data aggregation is similar to the encryption backdoor problem in computer science. This is sometimes referred to as the 'exceptional access system' problem. It

Data aggregation is similar to the encryption backdoor problem in computer science. This is sometimes referred to as the 'exceptional access system' problem. It is impossible to build such a system and then to ensure it is not abused or misused. The best example of this is trying to build a system that allows law enforcement to read private data. There's no way to ensure that only law enforcement (and none other) does that. Keys Under Doormats - https://www.schneier.com/wp-content/uploads/2016/09/paper-keys-under-doormats-CSAIL.pdf https://www.schneier.com/wp-content/uploads/2016/09/paper-ke...