diff --git a/client/src/mifare/desfirecrypto.c b/client/src/mifare/desfirecrypto.c
index 020d3c7e4..287e6313c 100644
--- a/client/src/mifare/desfirecrypto.c
+++ b/client/src/mifare/desfirecrypto.c
@@ -74,7 +74,10 @@ void DesfireClearIV(DesfireContext *ctx) {
 
 void DesfireSetKey(DesfireContext *ctx, uint8_t keyNum, enum DESFIRE_CRYPTOALGO keyType, uint8_t *key) {
     DesfireClearContext(ctx);
+    DesfireSetKeyNoClear(ctx, keyNum, keyType, key);
+}
 
+void DesfireSetKeyNoClear(DesfireContext *ctx, uint8_t keyNum, enum DESFIRE_CRYPTOALGO keyType, uint8_t *key) {
     ctx->keyNum = keyNum;
     ctx->keyType = keyType;
     memcpy(ctx->key, key, desfire_get_key_length(keyType));
diff --git a/client/src/mifare/desfirecrypto.h b/client/src/mifare/desfirecrypto.h
index 125647289..9fe486a3a 100644
--- a/client/src/mifare/desfirecrypto.h
+++ b/client/src/mifare/desfirecrypto.h
@@ -106,6 +106,7 @@ void DesfireClearContext(DesfireContext *ctx);
 void DesfireClearSession(DesfireContext *ctx);
 void DesfireClearIV(DesfireContext *ctx);
 void DesfireSetKey(DesfireContext *ctx, uint8_t keyNum, enum DESFIRE_CRYPTOALGO keyType, uint8_t *key);
+void DesfireSetKeyNoClear(DesfireContext *ctx, uint8_t keyNum, enum DESFIRE_CRYPTOALGO keyType, uint8_t *key);
 void DesfireSetCommandSet(DesfireContext *ctx, DesfireCommandSet cmdSet);
 void DesfireSetCommMode(DesfireContext *ctx, DesfireCommunicationMode commMode);
 void DesfireSetKdf(DesfireContext *ctx, uint8_t kdfAlgo, uint8_t *kdfInput, uint8_t kdfInputLen);