text: //
  //  NSData+DES.h
  //  demo
  //
  //  Created by Minsol on 2018/12/4.
  //  Copyright © 2018 Minsol. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSData (DES)
  
  - (NSData *)DESEncryptWithKey:(NSString *)key;
  - (NSString *)DESDecryptWithKey:(NSString *)key;
  
  @end
  