@benedikt-buchert , deleting the Dataset will delete the data in Data Lake and Profile. The ID graph will remain, you can try to open a customer care ticket to clear the whole ID graph.

Yes, you can use the Adobe Analytics Source connector to import your AA data into AEP. Once it is in the Data Lake, the data can be imported to CJA (Connection).

From a pure tech point of view, tt can be achieved if you collect the time and day as part of the data collection.e.g. if you are using Adobe Analytics server side forwarding then a plugin or client-side code can be used to populate time or day variables here The use-case is important if you want to retarget users who have visited on a Monday then creating the Traits and Segments in Audience Manager using the above is appropriate. i.e. The users will qualify from the first Monday until the Trait...

Web SDK is typically used as an unauthenticated data collection source. The data in motion would be secure viaHTTPS/TLS. Depending on your use-case, you can also look at Edge API or streaming API as an authenticated server to server endpoint to stream the web data.

It will depend if the data collection is for AEP or Adobe Analytics. For AEP as compared with Adobe Analytics, where events would be assigned based on event1,event2,etcYou would have to create a schema to capture the event as a string value or a measure data type where the value is 1 or 0.A good starting point is to review the out of the box Field Groups otherwise you can always create your Schemas from scratch.

No, you cannot decrypt using data prep. Depending on the algorithm used, it would be a one-way hash. The data prep has functions to encrypt or hash the raw values into hashed values.

The default will be 120 days. The user will qualify for 120 days unless they re-qualify where the expiry is extended.