diff --git a/BUILD b/BUILD
index 0a3d7c74..869e03ce 100644
--- a/BUILD
+++ b/BUILD
@@ -64,6 +64,7 @@ proto_library(
         "//contrib/envoy/extensions/filters/network/mysql_proxy/v3:pkg",
         "//contrib/envoy/extensions/filters/network/postgres_proxy/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/rocketmq_proxy/v3:pkg",
+        "//contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha:pkg",
         "//envoy/admin/v3:pkg",
         "//envoy/config/accesslog/v3:pkg",
         "//envoy/config/bootstrap/v3:pkg",
diff --git a/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/BUILD b/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/BUILD
new file mode 100644
index 00000000..1c1a6f6b
--- /dev/null
+++ b/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/BUILD
@@ -0,0 +1,12 @@
+# DO NOT EDIT. This file is generated by tools/proto_format/proto_sync.py.
+
+load("@envoy_api//bazel:api_build_system.bzl", "api_proto_package")
+
+licenses(["notice"])  # Apache 2
+
+api_proto_package(
+    deps = [
+        "//envoy/config/core/v3:pkg",
+        "@com_github_cncf_udpa//udpa/annotations:pkg",
+    ],
+)
diff --git a/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/cryptomb.proto b/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/cryptomb.proto
new file mode 100644
index 00000000..aa2d8cd2
--- /dev/null
+++ b/contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha/cryptomb.proto
@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package envoy.extensions.private_key_providers.cryptomb.v3alpha;
+
+import "envoy/config/core/v3/base.proto";
+
+import "google/protobuf/duration.proto";
+
+import "udpa/annotations/sensitive.proto";
+import "udpa/annotations/status.proto";
+import "validate/validate.proto";
+
+option java_package = "io.envoyproxy.envoy.extensions.private_key_providers.cryptomb.v3alpha";
+option java_outer_classname = "CryptombProto";
+option java_multiple_files = true;
+option (udpa.annotations.file_status).package_version_status = ACTIVE;
+
+// [#protodoc-title: CryptoMb private key provider]
+// [#extension: envoy.tls.key_providers.cryptomb]
+
+// A CryptoMbPrivateKeyMethodConfig message specifies how the CryptoMb private
+// key provider is configured. The private key provider provides `SIMD`
+// processing for RSA sign and decrypt operations (ECDSA signing uses regular
+// BoringSSL functions). The provider works by gathering the operations into a
+// worker-thread specific queue, and processing the queue using `ipp-crypto`
+// library when the queue is full or when a timer expires.
+// [#extension-category: envoy.tls.key_providers]
+message CryptoMbPrivateKeyMethodConfig {
+  // Private key to use in the private key provider. If set to inline_bytes or
+  // inline_string, the value needs to be the private key in PEM format.
+  config.core.v3.DataSource private_key = 1 [(udpa.annotations.sensitive) = true];
+
+  // How long to wait until the per-thread processing queue should be
+  // processed. If the processing queue gets full (eight sign or decrypt
+  // requests are received) it is processed immediately. However, if the
+  // queue is not filled before the delay has expired, the requests
+  // already in the queue are processed, even if the queue is not full.
+  // In effect, this value controls the balance between latency and
+  // throughput. The duration needs to be set to a non-zero value.
+  google.protobuf.Duration poll_delay = 2 [(validate.rules).duration = {
+    required: true
+    gt {}
+  }];
+}
diff --git a/versioning/BUILD b/versioning/BUILD
index c57ddbb5..b8a81366 100644
--- a/versioning/BUILD
+++ b/versioning/BUILD
@@ -16,6 +16,7 @@ proto_library(
         "//contrib/envoy/extensions/filters/network/mysql_proxy/v3:pkg",
         "//contrib/envoy/extensions/filters/network/postgres_proxy/v3alpha:pkg",
         "//contrib/envoy/extensions/filters/network/rocketmq_proxy/v3:pkg",
+        "//contrib/envoy/extensions/private_key_providers/cryptomb/v3alpha:pkg",
         "//envoy/admin/v3:pkg",
         "//envoy/config/accesslog/v3:pkg",
         "//envoy/config/bootstrap/v3:pkg",