The Kanzi Cable is a JTAG/SWD Cable capable of debugging CPFM 00 or 01 devices (EVT and DVT devices) which have the Lightning port, using software called Astris. It can be connected to another SWD debugger, using the SWD port, and it can also do UART/Serial. They can be purchased from obscure markets. There are two known types of the Kanzi cable. The normal version and a prototype version with PROTO etched to it.
Uses
Dumping the SecureROM
One use of the cable is dumping the SecureROM from devices. This can be done using commands such as this one.