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If your Mac has become frustratingly slow, there are a number of ways you . to add new advice and tips for speeding up your Mac computer.

You'll just need to modify the date and time on your computer. Learn how to use trials of programs without them ever expiring instead of buying the real thing w Systm is the Do It Yourself show designed for the common geek who wants to quickly and easily learn how to dive into the latest and hottest tech projects. We will help you avoid pitfalls and get your project up and running fast. Permanently deleting files is something that a lot of people aren't aware of.

Actually, most people think that once a file is deleted, it is gone forever. This is not the case.

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Hard drives write to the disk via magnetic charges, positive and negative correlate to 1s and 0s for It may not be your number one spot for finding cool apps for your Android device, but the Amazon Appstore for Android is running a new promotion this week called "Geek Week," where eight of the most popular productivity and utility apps are now on sale for 48 percent off or mo The dreaded moment you hope never happens—someone has stolen your laptop.

You could have private information, pictures, or even private information belonging to the company you work for, all lost forever. It can cause you pain, money, or even a job. There are paid services th In , two brothers, Thomas and John Kroll, began work on an image editing software, which was eventually acquired in and released to the world in by Adobe. That software was Photoshop 1. Over the years, Photoshop b After six betas, iOS Some features are ones that Apple promised over eight months ago when iOS 11 was first pushed out. Your Mac's clipboard is great when you are just copying and pasting a phone number or address, but sometimes you end up having to re-copy the same thing over and over every day.


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To make those phrases a lot more easily accessible, the people over at Tiny Robot Software have rel An internet connection has become a basic necessity in our modern lives. Wireless hotspots commonly known as Wi-Fi can be found everywhere! If you have a PC with a wireless network card, then you must have seen many networks around you.

Sadly, most of these networks are sec Every year, Apple releases a new version of iOS. Each iteration promises new features to make using your iPhone that much better. This year, iOS 13 introduces over new features and changes, including system-wide Dark Mode for the first time on iPhone. That said, you might With a few Surveillance is always a useful tool in a hacker's arsenal, whether deployed offensively or defensively. Watching targets yourself isn't always practical, and traditional surveillance camera systems can be costly, lacking in capabilities, or both. Today, we will use motionEyeO Our recommended Kali Pi kit for beginners learning e To sum it up, files that you've deleted are not actually gone from your storage, they've just been moved to a different location.

You can then restore the fil You can beef up the security on your Mac all you want, but all the firewalls and antivirus apps in the world mean nothing when that can of soda tips over on your Macbook, destroying your laptop and all its data forever. You may have some of your data backed up to a cloud serv During a power outage at my apartment this year, I watched movies on my MacBook Pro instead of on my television.

While I had no complaints about the screen size, I did have an issue with how low the audio coming from my speakers was. External speakers would help, but I don't w In most cases, when the free trial of software is over, that's it—you're left to either pay for it or find an alternative. But what happens if the trial wasn't long enough to sell you on the product? It'd be nice if there was a way to test it out again without having to whip o Smartphones are now indispensable when traveling.

Domestic and overseas travel alike require food, navigation, translation, and so much more to make work or vacation successful. Gone are the days of lugging multiple tourist books around with you everywhere you go — you need to In one of Apple's newer ads, the company claims that "more photos are taken with the iPhone than any other camera.

Let's find a chunk of our edited binary big enough that it likely won't be repeated in the whole binary. That's the memory representation of the code, a whole 8 blocks of four bytes starting at 0xc9c. Taking endianness into account, we must reverse them and we get the following:. The very first byte of the series is the 74 that we switched into By changing it back, we can deduce the original binary code to be:.

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Let's open the binary in a hex editor. I used vim, but feel free to use any hex editor at this point. HexFiend has a great GUI. The first part, before the colon, is the address of block. Following it are 16 bytes, broken off in two-byte segments. Incidentally, every Mach-O binary starts with the hex bytes cafebabe.

Drunk Kernel programmers probably thought it'd be funny. Now that we have our beautiful hex code loaded up, let's search for the first two bytes of our code to replace:. Too many results to make sense of. Let's add another two bytes. Search for " 8b45" instead and boom, only one result:. And… We're done!

Objective-C makes it really easy to mess with an app's internals. Try to program the licensing mechanism for your app in pure C, that will already make it harder for me to find my way around your binary. I am not a skilled hacker-yet with some very basic knowledge I tore this apart in no time. Implementing the various easy tips above takes very little time, yet would have made it enough of a pain for me that I would have given up. Kenneth Ballenegger develops cool Mac and iPhone software. Visit his personal blog for more writing on the world of design, software, and life. You can contact him at kenneth ballenegger.

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The A. Share This Story. Share Tweet. Kinja is in read-only mode. We are working to restore service. Why bother with stealth? My favourite approach is the Microsoft approach. It pops up, says "I'm cracked, click here", which takes the user to a web page that shows them all the benefits they'll reap if they get a legit version, just type your credit card number in this box and all is forgiven.

It's hilariously easy to make your installation legal, which is the point Just wanted to add that this is the exact opposite to what some large game companies do. I bought Settlers 7 an Ubisoft title and got kicked out of the single-player campaign every time my internet connection blipped.

In contrast, had I pirated the game, I would have had a paradoxically better experience. No incentive to buy, whatsoever. Forgive my numbness, but how does this work? How do you know the right signature to be verifying against? It seems to my not-much-of-a-programmer mind that you've got a chicken and egg scenario here. But that's obviously not the case, so you can explain briefly how it works? Or just paste a link. You move the UI messages into a separate resource file, as you would for language translation.

The executable signature is unaffected by the changed UI messages. Alternatively, you could use a broken hash and modify an unneeded string so as to produce a collision with the key you decided ahead of time. The fact that most simple copy protection can be broken by someone that knows a bit of assembly shouldn't surprise anyone writing applications, and this post is just self-congratulatory silliness that doesn't actually help someone that wants to protect their software.

I could show you how I can press 'F5' and decompile your code back to surprisingly readable pseudo-C, but that's not going to help you secure your application, it's just patting myself on the back and showing you how cool I am. It's not a real security solution. There's a simple open source kext that was first implemented for Mac OS X Confusion on Jan 18, The fact that most simple copy protection can be broken by someone that knows a bit of assembly shouldn't surprise anyone writing applications, But it does, which is the point of the author.

People will keep inventing the wheel over and over again and still be proud of their wheel. This kind of derogatory remarks are uncalled for. You have no idea about the thoughts or feelings of the author and have no reason to think ugly things. If I were to respond to your comment in the same way, I would say that you were just displaying your superiority complex over someone learning the ropes. Or perhaps bitterness and jealousy over the attention this article gets, while your more advanced knowledge does not get the attention it deserves.

I can come up with a number of epithets to attribute to you based on that little bit of text, all equally uncalled for.

Your Answer

Hey SeoxyS, Another fan of your writings. I like the occasional quote you throw in there. However: I don't agree with the way you phrased your headings. Verging on linkbait, even. RCE is a hobby of mine and I crack all sorts of shit; it's fun and challenging. I know quite a few people who do. This is the first time I have read such a blunt "I can crack your It sounded very arrogant at first. No one else that I know bothers with this direct attitude. I am sure Mac devs are more than aware Anticipating an article on this as a followup to your post.

RCE is not as difficult as you make it out to be, and amateurs can overcome the usual barriers quickly. Communities thrive on teaching amateurs the art, and they pick up these skills very quickly. I taught a few.

The great danger in the fight against piracy is that it's so damn interesting. You can spend months playing cat and mouse with the people trying to crack your schemes, ratcheting up the complexity to insane levels, and every time you come up with a new scheme and get it working you'll feel like a million bucks because you Won tm.

But the people on the other side feel the same way, there are more of them, and in reality, they're not actually hurting your business as badly as your delusions tell you they are - none of them were ever going to buy your shit anyway. Add features, improve your design, fix bugs, or tweak your shitty description and screen shots in the app store which, in my experience, will affect sales for most apps more than the first three factors put together. Literally any time that you devote to copy protection is wasted, unless you're Angry Birds and even then I'm not sure you're not reaching anywhere near a high enough percentage of the people that would happily pay for your product to worry about the ones that would rather just take it.

I agree. The arms race of building 'better' copy protections instead of continous improvement of your product won't do you any good. I think the main key is deciding on the investment. The amount of time put into those things can be expressed in money. So this poses two questions: 1. Would I be willing to pay the given amount to someone else to do it. If not and I still want to do it I should at least admit that this is for personal ambition and not for the product. It's OK everybody likes a challenge. Will it improve my sales? Again the money. What stands to gain from this.

How much effort is OK. Perhaps the simple checksum in addition to the common cmp jne check is enough to get a few sales. But that's about it for products with a market where uncracked time is not king. Look somewhere above for the gamasutra article about game releases and the value of time. And I think the time constraint doesn't work for many products.

The idea for one of my projects was to say "if you are able to crack it you can keep it". If someone spent the time and has the ability to do it, it's fine with me. Surely this is no viable solution for most products. But I'm curious how it will work out Vlasta on Jan 18, Agree, playing hide and seek with crackers is waste of time. I decided to make the anti-piracy protection trivial in the latest version of my software.

I just wrote a installation date into an. I want customers that love the software and are happy to pay the price I ask. Software piracy can be solved by social means, not technical means. Yea, artificial scarcity is fundamentally flawed.


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  • I even wrote a series about the various attempts on my blog. The App Store doesn't need high levels of security on your apps. No matter how much you obfuscate, it only takes one smart person to crack it and then your app is on all the bit torrent sites. People will buy from the App Store because they want the protection it provides and the convenience. They know when they download your app from the app store that it's not a virus, the install will be one click simple, and Apple has hand reviewed and approved the app.

    I think the Mac App Store protection is designed to be just enough to stop Average Joe from copying it onto a usb stick and giving it to his friend. In the end that's really what you want. You can reverse engineer the classnames with class-dump, subclass a class and override a suitable function e. I didn't know about that, that's really neat! Will need to do some research into that! PS: I'm poking fun at myself—since I wrote the original app, including misspelling.

    Also, I use American english, but I do prefer to use the british form of 'spelt' or 'burnt. Locke on Jan 17, Meh, decoding compiled C code is about just as easy for me. I wouldn't worry about it until it becomes a serious problem. The people who crack many apps in the scene are pretty decent at it and this will not slow them down. Edit: Actually, they're not very good at it, but this still won't slow them down much. Some people also view the windows as an invitation to throw the stones in, claiming they are too fragile to be of any protection anyway.

    Next time you buy a DRM-ed book from Amazon. Would that make you happier as a user? The way to solve this problem is to spend more time on adding more features into the frequently released newer versions of software.

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    Cracking all the same basic reg code would get boring for a few-dollar app. The challenge then is to write a script that automates the cracking. But does that actually matter? All you need is Google. I doubt it. I would actually lean the other way. If your system is far more secure than another identical system, people are less likely to bother targeting your application when they break open the other one much more easily. It's only when you bring something unique or "better" to the table that you make it worth spending significant amounts of effort on breaking. Well, that's more than just a shell.

    How so? All of which run inside a shell.

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    I think you misunderstand what a shell is. By the standards of this post's title, I could say that I have written huge pieces of software with "just a shell". In fact, the foundations of modern computing could be said to have been built with "just a shell". There was a time I did everything in a shell Clickies, checkboxes, buttons - shiny stuff.