How can an ISP cache traffic?

Question

Data transfer

How do equipment vendors propose to organize caching of traffic that should, in theory, be encrypted?

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Answer 1

Would you... at first tighten up the terminology or something...
Traffic is a process of movement. No matter what - the movement of cars on the road is also called "traffic"
Caching - the process of accumulation of intermediate data in a certain area with relatively fast access (compared to searching for an object in its usual location).
As you can see, in principle there is no and cannot be a connection :) You can cache an object - data, boxes, cars.
A caching server is usually built on the principle of intermediate storage - it accumulates data passing through it and gives the most frequently requested ones to the client from its storage (cache), and does not download from the original storage point. The provider can easily put such garbage on their own - in order to speed up the download of data - if a hundred thousand people download one video, then the caching server will download it to itself once, and will give it to the other 99999 requests from its cache :)

Answer 2

It is impossible to store the traffic of all users; it will be impossible to record the traffic of potentially unreliable individuals, for example, people who were involved in computer crimes, people from the opposition, and all those who stir up water.
It is impossible to decrypt encrypted traffic, they just look at the fact of activity