objective c - How to use fetch result of card.io scan to app in API and decrypt it -

i using card.io ios sdk , fetch card information following code. problem getting card number in encryted form this

received card info. number: ••••••••••••2430, expiry: 02/2014, cvv: 123. 

how can decrypted full 16 digit card number can use api pass purchase ticket using client or there kind of alternative pass recieved card information server side must need decrypt card number before process generate ticket? // someviewcontroller.m

- (ibaction)scancard:(id)sender {   cardiopaymentviewcontroller *scanviewcontroller = [[cardiopaymentviewcontroller alloc] initwithpaymentdelegate:self];   scanviewcontroller.apptoken = @"your_app_token_here"; // app token card.io website enter mine token here work   [self presentmodalviewcontroller:scanviewcontroller animated:yes]; }   // someviewcontroller.m  - (void)userdidcancelpaymentviewcontroller:(cardiopaymentviewcontroller *)scanviewcontroller {   nslog(@"user canceled payment info");   // handle user cancellation here...   [scanviewcontroller dismissmodalviewcontrolleranimated:yes]; }  - (void)userdidprovidecreditcardinfo:(cardiocreditcardinfo *)info inpaymentviewcontroller:(cardiopaymentviewcontroller *)scanviewcontroller {   nslog(@"received card info. number: %@, expiry: %02i/%i, cvv: %@.", info.redactedcardnumber, info.expirymonth, info.expiryyear, info.cvv);   // use card info...   [scanviewcontroller dismissmodalviewcontrolleranimated:yes]; } 

that's because you're using redacted card info purposely obfuscated user security. try using info.cardnumber right there in comments of code have written there. hope helps.