What is the point of OSDP if an RFID card can be cloned so easily! Isn't like having a 4096 bit encrypted WIFI with the password written on every walls?
Who told you that? Mifare Plus in SL3 has no flaws. DESFire has no flaws. If you don't have a HID SAM, you can't peek into HID iClass SE and SEOS. Or if you have elite keying. :P