i'm working on card reader now. want take data card. took uid. want take encrypted data. want enter secure mode , start session. did something. send command apdu start session every time return unknown exception 0x1f here code. terminalfactory factory = terminalfactory.getdefault(); list<cardterminal> terminals = factory.terminals().list(); terminal = terminals.get(0); card = terminal.connect("t=1"); cardchannel channel = card.getbasicchannel(); byte[] c1 = { (byte) 0x80, (byte) 0x72, (byte) 0x80, (byte) 0x00, (byte) 0x18, (byte) 0x5c, (byte) 0xc5, (byte) 0x0a, (byte) 0xa2, (byte) 0x5b, (byte) 0x38, (byte) 0x7f, (byte) 0x81, (byte) 0x3a, (byte) 0x3d, (byte) 0x1a, (byte) 0x88, (byte) 0x7d, (byte) 0x26, (byte) 0xfc, (byte) 0x2b, (byte) 0xa8, (byte) 0xa7, (byte) 0xdd, (byte) 0xdc, (byte) 0x71, (byte) 0xe0, (byte) 0xf3, (byte) 0xc6 }; responseapdu response = channel.transmit(new commandapdu(0xff, 0