diff --git a/adb/proto/Android.bp b/adb/proto/Android.bp
new file mode 100644
index 0000000..a7e5d9c
--- /dev/null
+++ b/adb/proto/Android.bp
@@ -0,0 +1,70 @@
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_defaults {
+    name: "libadb_protos_defaults",
+    cflags: [
+        "-Wall",
+        "-Wextra",
+        "-Wthread-safety",
+        "-Werror",
+    ],
+
+    compile_multilib: "both",
+
+    proto: {
+        export_proto_headers: true,
+        type: "lite",
+    },
+    srcs: [
+        "adb_known_hosts.proto",
+        "key_type.proto",
+        "pairing.proto",
+    ],
+    target: {
+        windows: {
+            compile_multilib: "first",
+            enabled: true,
+        },
+    },
+
+    visibility: [
+        "//system/core/adb:__subpackages__",
+    ],
+
+    stl: "libc++_static",
+
+    host_supported: true,
+    recovery_available: true,
+}
+
+cc_library {
+    name: "libadb_protos",
+    defaults: ["libadb_protos_defaults"],
+
+    apex_available: [
+        "com.android.adbd",
+        "test_com.android.adbd",
+    ],
+}
+
+// For running atest (b/147158681)
+cc_library_static {
+    name: "libadb_protos_static",
+    defaults: ["libadb_protos_defaults"],
+
+    apex_available: [
+        "//apex_available:platform",
+    ],
+}
diff --git a/adb/proto/adb_known_hosts.proto b/adb/proto/adb_known_hosts.proto
new file mode 100644
index 0000000..85d1489
--- /dev/null
+++ b/adb/proto/adb_known_hosts.proto
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+option java_package = "com.android.server.adb.protos";
+option java_outer_classname = "AdbKnownHostsProto";
+
+package adb.proto;
+
+// Each known host
+message HostInfo {
+    string guid = 1;
+}
+
+// Protobuf definition for the adb_known_hosts.
+message AdbKnownHosts {
+    repeated HostInfo host_infos = 1;
+}
diff --git a/adb/proto/jarjar-rules.txt b/adb/proto/jarjar-rules.txt
new file mode 100644
index 0000000..4e40637
--- /dev/null
+++ b/adb/proto/jarjar-rules.txt
@@ -0,0 +1 @@
+rule com.google.protobuf.** com.android.framework.protobuf.@1
diff --git a/adb/proto/key_type.proto b/adb/proto/key_type.proto
new file mode 100644
index 0000000..ed451c5
--- /dev/null
+++ b/adb/proto/key_type.proto
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+option java_package = "com.android.server.adb.protos";
+option java_outer_classname = "KeyTypeProto";
+
+package adb.proto;
+
+enum KeyType {
+    RSA_2048 = 0;
+}
diff --git a/adb/proto/pairing.proto b/adb/proto/pairing.proto
new file mode 100644
index 0000000..b0be20e
--- /dev/null
+++ b/adb/proto/pairing.proto
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+option java_package = "com.android.server.adb.protos";
+option java_outer_classname = "PairingProto";
+
+package adb.proto;
+
+// The type of packets used in the pairing protocol
+message PairingPacket {
+    enum Type {
+        SPAKE2_MSG = 0;
+        PEER_INFO = 1;
+    }
+}