Topic: Can you recommend Lisp encrpytion software

[hyposmurf]

Im looking to be able to encrypt my lisps.What I'd like to be able to do is have the encryption software installed on my USB stick,that way I can encrpyt at home or work.

[JohnK]

http://chincrypt.wz.cz/

[Guest]

.VLX or .FAS files would probably be your best bet.  Regular LSP files can be easily decrypted.

[Keith™]

.VLX or .FAS files would probably be your best bet.  Regular LSP files can be easily decrypted.

Agreed ... although VLX and FAS files can be decrypted as well, they are notoriously harder to do ... I have been on the bad end of the dubious task to have to do that ... you know the drill .. development computer died, data irretrievably lost ... deployed programming in only VLX format.

Ugh ... not a pretty sight

[hyposmurf]

Is there a way to easily convert them into this format?I guess you cant just add another file extension and load them just like lsp files?
Thanks for the link

[JohnK]

Wait, hold on a sec!

Do you want these `encrypted' lisp files to work in autocad?
OR
Is this just a way to protect your source code in between COMPILING?

NOTE:
Converting a LSP to VLX, FAS is called compiling so i use that word instead of `ENCRYPTING' even though `COMPILE' usually means to ``convert to machine code blah, blah''.


EDIT: Sorry fat fingers hit post to early.

[Keith™]

Is there a way to easily convert them into this format?I guess you cant just add another file extension and load them just like lsp files?
Thanks for the link

No, if you encrypt them using the program provided in the link, you will have to unencrypt them when you wish to use them.

If you compile them to VLX or FAS using the VLIDE, you will not need to do anything except load them.

[JohnK]

No, if you encrypt them using the program provided in the link, you will have to unencrypt them when you wish to use them.

If you compile them to VLX or FAS using the VLIDE, you will not need to do anything except load them.

However the VLIDE will not be able to reside on your USB stick (VLX and FAS does not fit the initial criteria).

[csgoh]

i use a safenet superpro usb dongle to control unauthorised usage of my lisp prog in my office. i compile my lisp into fas / vlx and with the api provided by the superpro dongle, and having a routine in the lisp , i check for the existence of the usb dongle key. if its not there, exit and the usern cannot use the lisp prog at all.

[septicad]

so... what if someone spent a whole lot of time developing a LISP/VLISP/DCL program and someone begged them to buy it....  what can you do to protect it???

on another note:

What languages are protectable? ARX?
Whats the easiest to learn or rather self-teach?

Thanks,
Steve

[CAB]

However the VLIDE will not be able to reside on your USB stick (VLX and FAS does not fit the initial criteria).

I don't think you need the original VLIDE to run a VLX or FAS routine.

[JohnK]

However the VLIDE will not be able to reside on your USB stick (VLX and FAS does not fit the initial criteria).

I don't think you need the original VLIDE to run a VLX or FAS routine.

huh?  ...no.

vlx and fas are `compilied' formats.

I often put that word compiled into quotes because the vlide doesnt really go thru the true compile process like in other languages. If you study the vlx/fas format you will see that all that really happens during the compile process is more like substitution. Your functions are intact as they are in the source, the only diff are names are substituted.

NOTE: A VLX file is the same as a FAS file except for a small additional header attached so when we say FAS or VLX we are basicly talking about the same thing.

[JohnK]

so... what if someone spent a whole lot of time developing a LISP/VLISP/DCL program and someone begged them to buy it....  what can you do to protect it???

on another note:

What languages are protectable? ARX?
Whats the easiest to learn or rather self-teach?

Thanks,
Steve

You cant with AutoLisp really. Well you can make your own loader; not that hard, ive made one or two.

yes ARX is protected. (ARX is just a DLL for AutoCAD written in C++).

Lisp

[Keith™]

FAS and VLX is different from "AutoCAD Protected Lisp"
There are many "AutoCAD Protected Lisp" unencryptors available on the internet ..
Sorry Se7en, but FAS is a compiled resource, VLX is not .. VLX contains compiled FAS files and uncompiled DCL files. Currently there is one known program to decompile FAS into assembly language with bits and pieces of lisp thrown in for good measure, but there is no known complete reversal program available. It makes FAS vulnerable, but not without considerable effort. VLX is vulnerable but only so much as a person would have to separate the resource into various FAS and DCL files.

[septicad]

so this is why people don't actively develop for ICAD too much... LSPs are easily stolen...