I have not studied this yet, but it seems like it might be interesting
to this group:

https://www.mdpi.com/1099-4300/25/11/1478

Chris M. Thomasson wrote:

> I have not studied this yet, but it seems like it might be
> interesting to this group:
>
> https://www.mdpi.com/1099-4300/25/11/1478

While I am no expert, this looks all a little to much for me,
when I can encrypt an image with AES and ImageMagick.

On 10/29/2023 1:38 PM, Stefan Claas wrote:
> Chris M. Thomasson wrote:
>
>> I have not studied this yet, but it seems like it might be
>> interesting to this group:
>>
>> https://www.mdpi.com/1099-4300/25/11/1478
>
> While I am no expert, this looks all a little to much for me,
> when I can encrypt an image with AES and ImageMagick.

Indeed you can. :^)

Fwiw, for some reason it kind of reminds me of an older fractal
encryption I was developing for fun in my free time. Here is some older
C code:

https://groups.google.com/g/comp.lang.c/c/vui6XP-IxRM/m/aDEeK-HkAQAJ

Funny Fractal Encryption is a good name for it. ;^)

On 10/29/2023 1:38 PM, Stefan Claas wrote:
> Chris M. Thomasson wrote:
>
>> I have not studied this yet, but it seems like it might be
>> interesting to this group:
>>
>> https://www.mdpi.com/1099-4300/25/11/1478
>
> While I am no expert, this looks all a little to much for me,
> when I can encrypt an image with AES and ImageMagick.
>
>

Check this older crap out:

https://pastebin.com/raw/fcV5YiJH

You should be able to compile and run it, even online.

;^D

Chris M. Thomasson wrote:

> Fwiw, for some reason it kind of reminds me of an older fractal
> encryption I was developing for fun in my free time. Here is some
> older C code:
>
> https://groups.google.com/g/comp.lang.c/c/vui6XP-IxRM/m/aDEeK-HkAQAJ
>
> Funny Fractal Encryption is a good name for it. ;^)

Nice idea, Chris! :-) I will try out the source code later and play
a bit with it.

Regards
Stefan
--
----Ed25519 Signature----
a104bb8b8901641e44800d1271106e83bbbf4ef04c0df3c74714073e955c06f3
c86a469bdf4a46ea21584c94cf5958e5e0bda309f1a3643fee48f226f3f05800

Chris M. Thomasson wrote:

> Check this older crap out:
>
> https://pastebin.com/raw/fcV5YiJH
>
> You should be able to compile and run it, even online.
>
> ;^D

Ok, will do.

Regards
Stefan
--
----Ed25519 Signature----
3fefe505f6bae9e69d9056b10ee853d6c17c219b2ed6745e54f75e938fe4a944
7eb0863efa09ec0088dfcc213cd804475e64ad7caa072e1502aed505b8e97b0b

Stefan Claas wrote:

> Chris M. Thomasson wrote:
>
> > Check this older crap out:
> >
> > https://pastebin.com/raw/fcV5YiJH
> >
> > You should be able to compile and run it, even online.
> >
> > ;^D
>
> Ok, will do.

Mmmh ..., all three programs given me errors, when compiling.

Regards
Stefan
--
----Ed25519 Signature----
3d36fdf4423c329b3eb498b312b48a19bebf93e50bc57fc4dfbadcad14f7b17c
cdee9b440c063dd57ee2b7727bb12d637404d200f28c6771a6e763dd24a6930f

On 10/30/2023 4:49 AM, Stefan Claas wrote:
> Stefan Claas wrote:
>
>> Chris M. Thomasson wrote:
>>
>>> Check this older crap out:
>>>
>>> https://pastebin.com/raw/fcV5YiJH
>>>
>>> You should be able to compile and run it, even online.
>>>
>>> ;^D
>>
>> Ok, will do.
>
> Mmmh ..., all three programs given me errors, when compiling.

Strange! I can get it to work online, an example screenshot:

https://i.ibb.co/7n0wdWv/image.png

And on my current compiler I have to use for some other projects:

https://i.ibb.co/Pj0QZLf/image.png

What type of errors are you getting? Thanks.

:^)

On 10/30/2023 1:46 PM, Chris M. Thomasson wrote:
> On 10/30/2023 4:49 AM, Stefan Claas wrote:
>> Stefan Claas wrote:
>>
>>> Chris M. Thomasson wrote:
>>>
>>>> Check this older crap out:
>>>>
>>>> https://pastebin.com/raw/fcV5YiJH
>>>>
>>>> You should be able to compile and run it, even online.
>>>>
>>>> ;^D
>>>
>>> Ok, will do.
>>
>> Mmmh ..., all three programs given me errors, when compiling.
>
> Strange! I can get it to work online, an example screenshot:
>
> https://i.ibb.co/7n0wdWv/image.png
>
> And on my current compiler I have to use for some other projects:
>
> https://i.ibb.co/Pj0QZLf/image.png
>
> What type of errors are you getting? Thanks.
>
> :^)
>
>

Fwiw, thank you for making me notice something strange, the cpack is
different on the two different compilers! Interesting:

Online:

https://i.ibb.co/7n0wdWv/image.png

Notice cpack at 756768?

And on MSVC ver: 4.8.09032

cpack is at 95375807?

Interesting!

Still, can you give me all of the errors you are getting, and tell me
the compiler you are using? Thanks again Stefan.

:^)

Chris M. Thomasson wrote:

>[...]

> Still, can you give me all of the errors you are getting, and tell me
> the compiler you are using? Thanks again Stefan.

Hi Chris,

$ gcc c1.c -o c1
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x20): undefined reference to `main'
/usr/bin/ld: /tmp/ccjaE96t.o: in function `ct_mbrotpixel':
c1.c:(.text+0x19f): undefined reference to `cos'
/usr/bin/ld: c1.c:(.text+0x26b): undefined reference to `sin'
collect2: error: ld returned 1 exit status

For the first program, I guess I may have to link to some lib, right?

The other two give more errros.

My C Compiler is:

$ gcc --version
gcc (Debian 10.2.1-6) 10.2.1 20210110
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Regards
Stefan
--
----Ed25519 Signature----
66a8b3ca469b88b8c51a3def1dcdfb50938dfdc41c74c8270e07399343b63af3
4be4228e4f332a1e538e05a8c6c992ea372558f04094b91b115f0627c278b707

On 10/30/2023 2:28 PM, Stefan Claas wrote:
> Chris M. Thomasson wrote:
>
>> [...]
>
>> Still, can you give me all of the errors you are getting, and tell me
>> the compiler you are using? Thanks again Stefan.
>
> Hi Chris,
>
> $ gcc c1.c -o c1
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
> (.text+0x20): undefined reference to `main'
> /usr/bin/ld: /tmp/ccjaE96t.o: in function `ct_mbrotpixel':
> c1.c:(.text+0x19f): undefined reference to `cos'
> /usr/bin/ld: c1.c:(.text+0x26b): undefined reference to `sin'
> collect2: error: ld returned 1 exit status
>
> For the first program, I guess I may have to link to some lib, right?

Link to the math library, -lm

>
> The other two give more errros.
>
> My C Compiler is:
>
> $ gcc --version
> gcc (Debian 10.2.1-6) 10.2.1 20210110
> Copyright (C) 2020 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Also, take not of the following in comp.lang.c:

https://groups.google.com/g/comp.lang.c/c/tQPJ4lfAP24