diff --git a/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client.cc b/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client.cc
index cbc7fb0..3738654 100644
--- a/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client.cc
+++ b/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client.cc
@@ -137,7 +137,6 @@
       // Empty public metadata is a valid value.
       public_metadata = input.public_metadata();
     }
-    const bool use_rsa_public_exponent = false;
     // Owned by BoringSSL.
     ANON_TOKENS_ASSIGN_OR_RETURN(
         const EVP_MD* sig_hash,
@@ -151,7 +150,7 @@
         auto rsa_bssa_blinder,
         RsaBlinder::New(rsa_public_key_proto.n(), rsa_public_key_proto.e(),
                         sig_hash, mgf1_hash, public_key_.salt_length(),
-                        use_rsa_public_exponent, public_metadata));
+                        /*use_rsa_public_exponent=*/true, public_metadata));
     ANON_TOKENS_ASSIGN_OR_RETURN(const std::string blinded_message,
                                  rsa_bssa_blinder->Blind(masked_message));
 
@@ -169,7 +168,6 @@
     blinded_token->set_key_version(public_key_.key_version());
     blinded_token->set_serialized_token(blinded_message);
     blinded_token->set_public_metadata(input.public_metadata());
-    blinded_token->set_do_not_use_rsa_public_exponent(!use_rsa_public_exponent);
     blinding_info_map_[blinded_message] = std::move(blinding_info);
   }
 
@@ -237,12 +235,6 @@
         anonymous_token.public_metadata()) {
       return absl::InvalidArgumentError(
           "Response public metadata does not match input.");
-    } else if (public_key_.public_metadata_support() &&
-               !anonymous_token.do_not_use_rsa_public_exponent()) {
-      // Bool do_not_use_rsa_public_exponent does not matter for the non-public
-      // metadata version.
-      return absl::InvalidArgumentError(
-          "Setting do_not_use_rsa_public_exponent to false is deprecated.");
     }
 
     // Unblind the blinded anonymous token to obtain the final anonymous token
diff --git a/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client_test.cc b/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client_test.cc
index 55fbbf3..5602cba 100644
--- a/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client_test.cc
+++ b/quiche/blind_sign_auth/anonymous_tokens/cpp/client/anonymous_tokens_rsa_bssa_client_test.cc
@@ -94,7 +94,6 @@
     const AnonymousTokensSignRequest& request, const RSAPrivateKey& private_key,
     bool enable_public_metadata = false) {
   AnonymousTokensSignResponse response;
-  const bool use_rsa_public_exponent = false;
   for (const auto& request_token : request.blinded_tokens()) {
     auto* response_token = response.add_anonymous_tokens();
     response_token->set_use_case(request_token.use_case());
@@ -102,15 +101,13 @@
     response_token->set_public_metadata(request_token.public_metadata());
     response_token->set_serialized_blinded_message(
         request_token.serialized_token());
-    response_token->set_do_not_use_rsa_public_exponent(
-        !use_rsa_public_exponent);
     std::optional<std::string> public_metadata = std::nullopt;
     if (enable_public_metadata) {
       public_metadata = request_token.public_metadata();
     }
     ANON_TOKENS_ASSIGN_OR_RETURN(
         std::unique_ptr<RsaBlindSigner> blind_signer,
-        RsaBlindSigner::New(private_key, use_rsa_public_exponent,
+        RsaBlindSigner::New(private_key, /*use_rsa_public_exponent=*/true,
                             public_metadata));
     ANON_TOKENS_ASSIGN_OR_RETURN(
         *response_token->mutable_serialized_token(),