diff --git a/proto/sharing_enums.proto b/proto/sharing_enums.proto
index 3d2e9cee..13a0fd00 100644
--- a/proto/sharing_enums.proto
+++ b/proto/sharing_enums.proto
@@ -30,7 +30,7 @@ option objc_class_prefix = "GNSHP";
 // in NearbyClearcutLogger (for android, or clearcut_event_logger as the
 // equivalence for Windows) for all events (may exclude settings), and
 // session_id for a pair of events (start and end of a session).
-// Next id: 64
+// Next id: 65
 enum EventType {
   UNKNOWN_EVENT_TYPE = 0;
 
@@ -235,6 +235,9 @@ enum EventType {
   // User sets account preference
   SET_ACCOUNT = 63;
 
+  // Decrypt certificate failure
+  DECRYPT_CERTIFICATE_FAILURE = 64;
+
   // LINT.ThenChange(//depot/google3/location/nearby/proto/nearby_event_codes.proto:SharingEventCode)
 }
 
@@ -762,6 +765,16 @@ enum DesktopTransferEventType {
   DESKTOP_TRANSFER_EVENT_SEND_TYPE_SENT = 8;
   DESKTOP_TRANSFER_EVENT_SEND_TYPE_ERROR = 9;
 }
+
+enum DecryptCertificateFailureStatus {
+  DECRYPT_CERT_UNKNOWN_FAILURE = 0;
+  DECRYPT_CERT_NO_SUCH_ALGORITHM_FAILURE = 1;
+  DECRYPT_CERT_NO_SUCH_PADDING_FAILURE = 2;
+  DECRYPT_CERT_INVALID_KEY_FAILURE = 3;
+  DECRYPT_CERT_INVALID_ALGORITHM_PARAMETER_FAILURE = 4;
+  DECRYPT_CERT_ILLEGAL_BLOCK_SIZE_FAILURE = 5;
+  DECRYPT_CERT_BAD_PADDING_FAILURE = 6;
+}
 // LINT.ThenChange(
 //   //depot/google3/location/nearby/cpp/sharing/clients/dart/platform/lib/types/models.dart
 // )