diff --git a/KeyStorage.cpp b/KeyStorage.cpp
index 50bba56..ebaefa3 100644
--- a/KeyStorage.cpp
+++ b/KeyStorage.cpp
@@ -383,9 +383,7 @@
                                    const km::AuthorizationSet& keyParams, const KeyBuffer& message,
                                    std::string* ciphertext) {
     km::AuthorizationSet opParams =
-            km::AuthorizationSetBuilder()
-                    .Authorization(km::TAG_ROLLBACK_RESISTANCE)
-                    .Authorization(km::TAG_PURPOSE, km::KeyPurpose::ENCRYPT);
+            km::AuthorizationSetBuilder().Authorization(km::TAG_PURPOSE, km::KeyPurpose::ENCRYPT);
     km::AuthorizationSet outParams;
     auto opHandle = BeginKeystoreOp(keystore, dir, keyParams, opParams, &outParams);
     if (!opHandle) return false;
@@ -414,7 +412,6 @@
     auto bodyAndMac = ciphertext.substr(GCM_NONCE_BYTES);
     auto opParams = km::AuthorizationSetBuilder()
                             .Authorization(km::TAG_NONCE, nonce)
-                            .Authorization(km::TAG_ROLLBACK_RESISTANCE)
                             .Authorization(km::TAG_PURPOSE, km::KeyPurpose::DECRYPT);
     auto opHandle = BeginKeystoreOp(keystore, dir, keyParams, opParams, nullptr);
     if (!opHandle) return false;