NSString * theString=@"e88d";

NSData * data;

// something I should implement

NSLog(@"%@", theString);

NSLog(@"%@",[data description]);

I want the results of the two printings are the same.

AES encryption and decryption:

(1).The server:

if the plaintext is :@"abcd";

the AES encrypted data(NSData data type) is :"d882830c dc892036 4345839f 13c7516a";

(2).in my local app, my code is :

NSData*data=[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://..."]]; NSString * mystring= [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

However, to decrypt data successfully, I must got a data(NSData date type) which equals to "d882830c dc892036 4345839f 13c7516a".But it is the mystring (NSString data type) not the data(NSData data type) that equals to the right value.

the encryption and decryption function both need a data(NSData data type) as input datas.

• (NSData*)AES128EncryptWithKey:(NSString*)key;
• (NSData*)AES128DecryptWithKey:(NSString*)key;