votan
September 15th, 2004, 11:22
exsekey has 2 flavours: the old model and micro model.
I got a demo set from the company.
The envelope mechanism only checks whether the dongle is plugged. The decryption is dongle-independent.
There is a memory edit util of exsekey. To reach the memory you need a 10-char.s password. however, the implementation is weak and the password check is performed in PC memory, not in the dongle, thus i modified this edit util to display the correct password after a try with a dummy password.
more details about the key:
pic16c505 is the microcontroller
93c46b is the serial eeprom
also a nor and a nand logic gates
several transistor,resistors..
apis

i dont remember the actual api names,but their functions)
readcell
readflag
writecell
writeflag
donglepresent
checkdate
checkprogramrunnumber
several communication functions
note to tgodd: tgodd,beside marx crypto, there are still commercial dongles which use microchip's products (exsekey,hyper-lock etc.). what a pity
