diff --git a/server_tb_LinkedMall/pkg/crypto/crypto.go b/server_tb_LinkedMall/pkg/crypto/crypto.go
new file mode 100644
index 0000000..adbbf17
--- /dev/null
+++ b/server_tb_LinkedMall/pkg/crypto/crypto.go
@@ -0,0 +1,25 @@
+package crypto
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"time"
+)
+
+// GenerateNonce 生成随机字符串，用于防重放
+func GenerateNonce() string {
+	buf := make([]byte, 16)
+	_, _ = rand.Read(buf)
+	return hex.EncodeToString(buf)
+}
+
+// GenerateTimestamp 生成当前时间戳（毫秒）
+func GenerateTimestamp() int64 {
+	return time.Now().UnixMilli()
+}
+
+// FormatTimestamp 格式化时间戳为字符串
+func FormatTimestamp(ts int64) string {
+	return fmt.Sprintf("%d", ts)
+}
\ No newline at end of file