diff --git a/bootstrapper/initproto/init.pb.go b/bootstrapper/initproto/init.pb.go
index 77bbcde19..741aa9a26 100644
--- a/bootstrapper/initproto/init.pb.go
+++ b/bootstrapper/initproto/init.pb.go
@@ -26,15 +26,15 @@ type InitRequest struct {
 	unknownFields protoimpl.UnknownFields
 
 	// repeated string autoscaling_node_groups = 1; removed
-	MasterSecret           []byte `protobuf:"bytes,2,opt,name=master_secret,json=masterSecret,proto3" json:"master_secret,omitempty"`
-	KmsUri                 string `protobuf:"bytes,3,opt,name=kms_uri,json=kmsUri,proto3" json:"kms_uri,omitempty"`
-	StorageUri             string `protobuf:"bytes,4,opt,name=storage_uri,json=storageUri,proto3" json:"storage_uri,omitempty"`
-	KeyEncryptionKeyId     string `protobuf:"bytes,5,opt,name=key_encryption_key_id,json=keyEncryptionKeyId,proto3" json:"key_encryption_key_id,omitempty"`
-	UseExistingKek         bool   `protobuf:"varint,6,opt,name=use_existing_kek,json=useExistingKek,proto3" json:"use_existing_kek,omitempty"`
+	// bytes master_secret = 2; removed
+	KmsUri     string `protobuf:"bytes,3,opt,name=kms_uri,json=kmsUri,proto3" json:"kms_uri,omitempty"`
+	StorageUri string `protobuf:"bytes,4,opt,name=storage_uri,json=storageUri,proto3" json:"storage_uri,omitempty"`
+	// string key_encryption_key_id = 5; removed
+	// bool use_existing_kek = 6; removed
 	CloudServiceAccountUri string `protobuf:"bytes,7,opt,name=cloud_service_account_uri,json=cloudServiceAccountUri,proto3" json:"cloud_service_account_uri,omitempty"`
 	KubernetesVersion      string `protobuf:"bytes,8,opt,name=kubernetes_version,json=kubernetesVersion,proto3" json:"kubernetes_version,omitempty"`
 	// repeated SSHUserKey ssh_user_keys = 9; removed
-	Salt                 []byte                 `protobuf:"bytes,10,opt,name=salt,proto3" json:"salt,omitempty"`
+	// bytes salt = 10; removed
 	HelmDeployments      []byte                 `protobuf:"bytes,11,opt,name=helm_deployments,json=helmDeployments,proto3" json:"helm_deployments,omitempty"`
 	EnforcedPcrs         []uint32               `protobuf:"varint,12,rep,packed,name=enforced_pcrs,json=enforcedPcrs,proto3" json:"enforced_pcrs,omitempty"`
 	EnforceIdkeydigest   bool                   `protobuf:"varint,13,opt,name=enforce_idkeydigest,json=enforceIdkeydigest,proto3" json:"enforce_idkeydigest,omitempty"`
@@ -76,13 +76,6 @@ func (*InitRequest) Descriptor() ([]byte, []int) {
 	return file_init_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *InitRequest) GetMasterSecret() []byte {
-	if x != nil {
-		return x.MasterSecret
-	}
-	return nil
-}
-
 func (x *InitRequest) GetKmsUri() string {
 	if x != nil {
 		return x.KmsUri
@@ -97,20 +90,6 @@ func (x *InitRequest) GetStorageUri() string {
 	return ""
 }
 
-func (x *InitRequest) GetKeyEncryptionKeyId() string {
-	if x != nil {
-		return x.KeyEncryptionKeyId
-	}
-	return ""
-}
-
-func (x *InitRequest) GetUseExistingKek() bool {
-	if x != nil {
-		return x.UseExistingKek
-	}
-	return false
-}
-
 func (x *InitRequest) GetCloudServiceAccountUri() string {
 	if x != nil {
 		return x.CloudServiceAccountUri
@@ -125,13 +104,6 @@ func (x *InitRequest) GetKubernetesVersion() string {
 	return ""
 }
 
-func (x *InitRequest) GetSalt() []byte {
-	if x != nil {
-		return x.Salt
-	}
-	return nil
-}
-
 func (x *InitRequest) GetHelmDeployments() []byte {
 	if x != nil {
 		return x.HelmDeployments
@@ -319,69 +291,60 @@ var File_init_proto protoreflect.FileDescriptor
 
 var file_init_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/bootstrapper/initproto/init.proto b/bootstrapper/initproto/init.proto
index 4cee0f118..68e0440cd 100644
--- a/bootstrapper/initproto/init.proto
+++ b/bootstrapper/initproto/init.proto
@@ -10,15 +10,15 @@ service API {
 
 message InitRequest {
   // repeated string autoscaling_node_groups = 1; removed
-  bytes master_secret = 2;
+  // bytes master_secret = 2; removed
   string kms_uri = 3;
   string storage_uri = 4;
-  string key_encryption_key_id = 5;
-  bool use_existing_kek = 6;
+  // string key_encryption_key_id = 5; removed
+  // bool use_existing_kek = 6; removed
   string cloud_service_account_uri = 7;
   string kubernetes_version = 8;
   // repeated SSHUserKey ssh_user_keys = 9; removed
-  bytes salt = 10;
+  // bytes salt = 10; removed
   bytes helm_deployments = 11;
   repeated uint32 enforced_pcrs = 12;
   bool enforce_idkeydigest = 13;
diff --git a/cli/internal/cmd/init.go b/cli/internal/cmd/init.go
index c1694b2d0..53f40001c 100644
--- a/cli/internal/cmd/init.go
+++ b/cli/internal/cmd/init.go
@@ -161,12 +161,8 @@ func (i *initCmd) initialize(cmd *cobra.Command, newDialer func(validator *cloud
 
 	spinner.Start("Initializing cluster ", false)
 	req := &initproto.InitRequest{
-		MasterSecret:           masterSecret.Key,
-		Salt:                   masterSecret.Salt,
 		KmsUri:                 masterSecret.EncodeToURI(),
 		StorageUri:             uri.NoStoreURI,
-		KeyEncryptionKeyId:     "",
-		UseExistingKek:         false,
 		CloudServiceAccountUri: serviceAccURI,
 		KubernetesVersion:      versions.VersionConfigs[k8sVersion].ClusterVersion,
 		KubernetesComponents:   versions.VersionConfigs[k8sVersion].KubernetesComponents.ToInitProto(),