Battelle is great. They also created some software called Cantor Dust [1] that turns files into images to allow humans to easily spot obfuscated data or files.
The sad thing about this kind of work, because I love it, is that to get paid to do it you need clearances and polygraphs and periodic reinvestigations/continuous monitoring and all sorts of things that I find unpleasant.
Ah interesting.. wonder if you can model this with a recursively expanded algebraic expression. I've been thinking lately along similar lines about polynomials that encode pushdown automata, so this is cool to see.
tomhee 19 minutes ago [-]
If you have an answer I'd be happy to hear it!
jkrshnmenon 38 minutes ago [-]
I wonder if someone has already made a Reverse Engineering CTF challenge for this concept.
Am I right in deducing that this language gets its power from self-modifying code? I.e. flipping bits within addresses of the opcodes of the running program?
tomhee 2 hours ago [-]
You are indeed right
tromp 1 hours ago [-]
I would have expected the language documentation to focus more on this observation and to explain for instance how self modification is used to implement while loops. But I don't even see the term mentioned anywhere?!
It was once in the Readme but as I kept developing it more it become longer and longer, so I moved it into the wiki, and especially to here: https://esolangs.org/wiki/FlipJump
Ah, the convenience of brainfuck with the performance of flip jump. Excellent.
tomhee 1 hours ago [-]
By the way, as a challenge, try how you can program an "If" statement in Flipjump.
1 hours ago [-]
jumploops 45 minutes ago [-]
AND, OR, NOT - pick 2
sroussey 25 minutes ago [-]
NOR - pick 1
dlcarrier 1 hours ago [-]
Maxim (now owned by Analog) actually manufactures a single-instruction processor series, called MAXQ. It uses a single move instruction, with a flag for literals, and a transport triggered architecture.
platz 2 hours ago [-]
How is a jump realized by Not Gates?
tomhee 2 hours ago [-]
I dont think that the jump can be realized by NOT gates, but it's essentially "where to find the next NOT command".
The jump is indeed a crucial part of the language, as it allows going back, and especially to make self-modifying code.
Jerrrry 2 hours ago [-]
I'm guessing by not jumping into a terminating/ halting NOOP.
The logic is within the branching.
artemonster 1 hours ago [-]
Id appreciate more explanations from the power of combined bitflip & goto
That was a long time ago, though, and the project is interesting enough, so I'm going to assume you've learned your lesson and unban you. Please stop using multiple accounts for this though!
tomhee 3 hours ago [-]
Thanks man, I appreciate it.
jimbob45 3 hours ago [-]
Dang, I have to know what triggered you to say this. It’s not the same user account so you would have had to have recognized the URL and written based on that.
Do you keep notes on each astroturfed submission and auto-trigger reposts to notify yourself? Or did you just happen to recognize this? 20 minutes from his post to your comment is absurdly good moderation.
dang 2 hours ago [-]
https://news.ycombinator.com/item?id=42742462 was on the front page. We got an email suggesting that the URL should be https://github.com/tomhea/c2fj instead of https://github.com/tomhea/flip-jump. That made sense, except it turned out that github.com/tomhea was banned. That seemed odd because we don't normally ban github domains, so I looked at the history https://news.ycombinator.com/from?site=github.com%2Ftomhea (most of which will only be visible to users who have 'showdead' set to 'yes' in their profile), and it was pretty easy to see that https://news.ycombinator.com/item?id=34856792 was, let's call it, the original sin in this chain of woe. It was also pretty obvious that the other submitting accounts were all related. Since the project itself is interesting I figured the best thing to do was give the submitter a second chance, so I picked the earlier post from today (the OP) and swapped it out for the other one (42742462).
I hope that answers your question!
doormatt 45 minutes ago [-]
You sir, are amazing. Thank you for being so utterly transparent.
chicken_grease 3 hours ago [-]
[dead]
Rendered at 22:46:45 GMT+0000 (Coordinated Universal Time) with Vercel.
[1] https://github.com/Battelle/movfuscator
The sad thing about this kind of work, because I love it, is that to get paid to do it you need clearances and polygraphs and periodic reinvestigations/continuous monitoring and all sorts of things that I find unpleasant.
[1] https://github.com/Battelle/cantordust
It was once in the Readme but as I kept developing it more it become longer and longer, so I moved it into the wiki, and especially to here: https://esolangs.org/wiki/FlipJump
The logic is within the branching.
https://github.com/tomhea/flip-jump/wiki/Learn-FlipJump
This will let you understand how to implement the very basic "if" in flipjump.
I tried to make it as easy for newcomers, but please feel free and update me if something is written complicated.
After you understand up to the macros, you can try yourself to understand the xor macro, which most of the library is built based on it: https://github.com/tomhea/flip-jump/blob/fe51448932e78db7d76...
That was a long time ago, though, and the project is interesting enough, so I'm going to assume you've learned your lesson and unban you. Please stop using multiple accounts for this though!
Do you keep notes on each astroturfed submission and auto-trigger reposts to notify yourself? Or did you just happen to recognize this? 20 minutes from his post to your comment is absurdly good moderation.
I hope that answers your question!