diff --git a/yacl/crypto/aead/aead.h b/yacl/crypto/aead/aead.h
index 324df07f..5d622711 100644
--- a/yacl/crypto/aead/aead.h
+++ b/yacl/crypto/aead/aead.h
@@ -18,9 +18,9 @@
 
 namespace yacl::crypto {
 
-// =============================================
-// AEAD: Authenticated Encryption And Decryption
-// =============================================
+// ===================================================
+// AEAD: Authenticated Encryption with Associated Data
+// ===================================================
 //
 // AEAD provides confidentiality by encrypting the data with a symmetric
 // encryption algorithm, and provides authenticity by using a MAC tag over the
diff --git a/yacl/crypto/oprf/oprf.h b/yacl/crypto/oprf/oprf.h
index d9a85c1a..86d4dd1d 100644
--- a/yacl/crypto/oprf/oprf.h
+++ b/yacl/crypto/oprf/oprf.h
@@ -138,7 +138,7 @@ class OprfClient {
     YACL_ENFORCE(ctx_ != nullptr);  // make sure context is setup
 
     auto* const ec = ctx_->BorrowEcGroup();
-    if (blind_inv_ != 0_mp) {
+    if (blind_inv_ == 0_mp) {
       MPInt::InvertMod(blind_, ec->GetOrder(), &blind_inv_);
     }