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+* POUF:
+* Title:
+* Version:
+* Last-Modified:
+* Author:
+* Status:
+* Uptane Version Implemented:
+* Created:
+
+# Abstract
+
+# Protocols
+
+This section describes the protocols used to transmit data in the implementation. At a minimum, this should answer the following questions:
+
+What encoding format is used? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#meta_structures)
+
+Are any files hosted? What protocol is used to transmit hosted files?
+
+## Message Handler Table
+
+What messages are sent by Uptane entities?
+
+
+| Request | Sender | Receiver | Data | Response | Specification Reference |
+| ------- | ------ | -------- | ---- | -------- | ----------------------- |
+
+
+# Operations
+This section includes descriptions of optional features from the standard, as
+well as any additional features supported by the implementation. At a minimum,
+this should include the following:
+
+Which ECU is used as the primary ECU?
+* The primary ECU MAY be the same ECU that communicates with the server (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#rfc.section.5).
+
+What delegation features are supported (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#targets_role_delegations)?
+* How does the implementation get a secure source of time?
+* Are custom delegated targets roles supported?
+* Are terminating delegations supported?
+* Are multi-role delegations (TAP 3) supported?
+
+What value is used for the public key identifier? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#common_metadata)
+
+Does the Root metadata support mapping roles to URLs (TAP 5)? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#root_meta)
+
+Is there any additional or custom metadata included in Targets metadata? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#targets_meta, https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#custom-metadata-about-images)
+
+How are the filenames for delegations listed? Are wildcards supported? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#delegations_meta)
+
+Does Snapshot metadata include the Root filename and version number? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#snapshot_meta)
+
+How many repositories does the implementation use? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#repo_mapping_meta)
+
+How does the implementation specify repository mapping metadata? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#repo_mapping_meta)
+
+How do ECUs securely access the current time? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#server-repository-implementation-requirements)
+
+Is the Image repository interface public? Does it require authentication? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#image-repository)
+
+Is the Director repository interface public? Does it support encryption? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#director_repository)
+
+How does the Director repository identify a vehicle? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#directing-installation-of-images-on-vehicles)
+
+Does the Director repository make any additional checks? What does it do it a check fails? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#directing-installation-of-images-on-vehicles)
+
+What additional data about ECUs and vehicles is stored in the inventory database? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#inventory_db_)
+
+Is the ECU key symmetric? Is the same key used for encryption and signing? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#build-time-prerequisite-requirements-for-ecus)
+
+Does the implementation support sending diffs of the vehicle version manifest? If so, how can the Director request the full manifest? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#construct_manifest_primary)
+
+Do any Secondaries not have storage? If so, how will they request images from the Primary and should they backup their previous working image? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#send_images_primary)
+
+What are the preconditions for installing an image? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#install_image)
+
+Does the Primary write version reports to disk? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#create_version_report)
+
+Which ECUs perform full verification? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#full_verification)
+
+Does the Primary ECU check that the Targets metadata from the Director repository only contains ECU ids present on the vehicle? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#full_verification)
+
+Does the Root, Snapshot, Timestamp, or Targets metadata verification process have any steps in addition to those required in the Standard? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#check_root)
+
+# Usage
+
+What kind of storage is used by the Image repository and which authorization mechanisms does it employ? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#image-repository)
+
+What kind of storage is used by the Director repository and which authorization mechanisms does it employ? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#director_repository)
+
+What database system is used for the inventory database? (https://uptane.github.io/papers/ieee-isto-6100.1.0.0.uptane-standard.html#inventory_db)
+
+How are keys managed?
+
+What steps are taken to initialize the Image and Directory repositories?
+
+Are ECUs registered with a repository? How does this work?
+
+## Data Table
+
+| Location | Data |
+| -------- | ---- |
+|Primary ECU | |
+| Full verification Secondary ECU |  |
+| Partial verification Secondary ECU |  |
+| Director repository | |
+| Image repository | |
+| ... | |
+
+# Formats
+This section details the data definitions used for files transmitted as part of Uptane. This should include at least the following:
+* General metadata format (including signature header)
+* Root metadata
+* Snapshot metadata
+* Timestamp metadata
+* Targets metadata, including any custom fields
+* Delegated Targets metadata, if different than Targets metadata
+* ECU metadata and vehicle version manifest