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Used in: TEKSignature, TemporaryExposureKeyExport

• optional string verification_key_version = 3

  Key version for rollovers Must be in character class [a-zA-Z0-9_]. E.g., 'v1'

• optional string verification_key_id = 4

  Alias with which to identify public key to be used for verification Must be in character class [a-zA-Z0-9_] For cross-compatibility with Apple, use MCC (https://en.wikipedia.org/wiki/Mobile_country_code).

• optional string signature_algorithm = 5

  ASN.1 OID for Algorithm Identifier. Supported algorithms are either 1.2.840.10045.4.3.2 or 1.2.840.10045.4.3.4

Used in: TEKSignatureList

• optional SignatureInfo signature_info = 1

  Info about the signing key, version, algorithm, etc.

• optional int32 batch_num = 2

  E.g., Batch 2 of 10

• optional int32 batch_size = 3

• optional bytes signature = 4

  Signature in X9.62 format (ASN.1 SEQUENCE of two INTEGER fields)

• repeated TEKSignature signatures = 1

Used in: TemporaryExposureKeyExport

• optional bytes key_data = 1

  Key of infected user

• optional int32 transmission_risk_level = 2

  Varying risks associated with exposure depending on type of verification Ignored by the v1.5 client API when report_type is set.

• optional int32 rolling_start_interval_number = 3

  The interval number since epoch for which a key starts

• optional int32 rolling_period = 4

  Increments of 10 minutes describing how long a key is valid

  defaults to 24 hours

• optional TemporaryExposureKey.ReportType report_type = 5

  Type of diagnosis associated with a key.

• optional sint32 days_since_onset_of_symptoms = 6

  Number of days elapsed between symptom onset and the TEK being used. E.g. 2 means TEK is 2 days after onset of symptoms.

Data type representing why this key was published.

Used in: TemporaryExposureKey

• UNKNOWN = 0

  Never returned by the client API.

• CONFIRMED_TEST = 1

• CONFIRMED_CLINICAL_DIAGNOSIS = 2

• SELF_REPORT = 3

• RECURSIVE = 4

• REVOKED = 5

  Used to revoke a key, never returned by client API.

Protobuf definition for exports of confirmed temporary exposure keys. The full file format is documented under "Exposure Key Export File Format and Verification" at https://www.google.com/covid19/exposurenotifications/ These files have a 16-byte, space-padded header before the protobuf data starts. They will be contained in a zip archive, alongside a signature file verifying the contents.

• optional fixed64 start_timestamp = 1

  Time window of keys in this file based on arrival to server, in UTC seconds

• optional fixed64 end_timestamp = 2

• optional string region = 3

  Region for which these keys came from (e.g., country)

• optional int32 batch_num = 4

  E.g., Batch 2 of 10. Ordinal, 1-based numbering. Note: Not yet supported on iOS. Use values of 1 for both.

• optional int32 batch_size = 5

• repeated SignatureInfo signature_infos = 6

  Information about signatures

• repeated TemporaryExposureKey keys = 7

  The TemporaryExposureKeys for initial release of keys. Keys should be included in this list for initial release, whereas revised or revoked keys should go in revised_keys.

• repeated TemporaryExposureKey revised_keys = 8

  TemporaryExposureKeys that have changed status. Keys should be included in this list if they have changed status or have been revoked.