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Facebook/aad_notes_for_newjoiners.md

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+# New User Registartion
+Our goal is to allow user registration while prevent abusive user from being registered.
+That is give the limmited amount of inormation we have about the user, we need to classify or predict his intent.
+
+Ideally we would not even allocate an id for the abusive users. Therefore we could separate our checks into two categories:
+- preregistration checks: where user doesn't even have id allocated
+- registration checks: user has an id
+
+
+## Preregistation
+
+## Registring
+We have multiple mechanisms which help us to prevent registration of abusive users. Those are:
+- ML Classifiers
+- Regattacks
+- Anomaly detection
+<!-- TODO: add more  -->
+
+As far as I understand, once we detect abusive user registration we send them to UFAC. UFAC then would propose a number of challenges and either clear the user, or confirm abusive character of the registration.
+
+In that regard [ufac_core][ufac_core_table] table is a good source of data. Take a time and check what data it contains.
+
+Some interesting Scuba queries are:
+- [UFAC enrollmets per reason][scuba_ufac_enrollment_reason]
+- [UFAC clears per reason][scuba_ufac_clears] - in other words false positives (FP).
+- [UFAC enrollments per context][scuba_ufac_context]
+
+Some interesting columns/values in [ufac_core][ufac_core_table] are:
+- Event - enrolled, cleared
+- Violation Type - FAKE_ACCOUNT
+-
+
+# Must Read
+- [The Life of a Registration model][life_of_reg_model]
+    - Describes registration model a bit more.
+# Code Ownership
+One could use [bunnylol ownership manager][bunnylol_ownership_manager] to get the list of assets we own.
+
+
+<!-- ## References -->
+
+[ufac_core_table]: https://www.internalfb.com/intern/data/info/tables/scuba/uber/ufac_core/
+[scuba_ufac_enrollment_reason]: https://fburl.com/scuba/ufac_core/2eqmiib9
+[scuba_ufac_clears]: https://fburl.com/scuba/ufac_core/17ebiuzs
+[scuba_ufac_challenge]: https://fburl.com/scuba/ufac_core/np8svxf0
+[scuba_ufac_context]: https://fburl.com/scuba/ufac_core/e2513thj
+[bunnylol_ownership_manager]: https://fburl.com/catalog/uzazxbwb
+[life_of_reg_model]: https://fb.workplace.com/notes/1034802330668606