• Serial Key B2 Area 51
• Serial Key B2 Area 51 Code

We have thousands of rows of data in the following format

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Any serial verification algorithm embedded within your application can be decompiled, so a serial key generator will be pretty easy to build. A good starting point is the article you gave. It tells you how to build a key verification system, and how to generate keys for your (legitimate) users. It only has one serial port, called Serial. To use Serial1 you will need a bigger board such as a Mega2560, or define it as a SoftwareSerial port and use two other IO pins of your choice for it, though at lower baud rates than Serial can run at. The 2015 film Area 51 is a mockumentary which depicts four individuals attempting to sneak into Area 51. The 'Hangar 51' [69] government warehouse of the Indiana Jones films stores, among other exotic items, the recovered Ark of the Covenant and an alien corpse from Roswell. A serial can also be referred to as a 'CD Key'. When you search for 'area 51 cd serial' for example, you may find the word 'serial' amongst the results. This usually means your warez download includes a serial number. Popular Download Searches. Area 51, also officially known as Groom Lake or Homey Airport (ICAO: KXTA) is a remote detachment of Edwards Air Force Base. According to the Central Intelligence Agency (CIA), the correct names for the Area 51 facility are the Nevada Test and Training Range and Groom Lake, though the name Area.

I would like to add a serial number based on the 'Born On' column as follows

The 'serial number' needs to be grouped by 'born on' date.Please help. Thanks.

1 Answer

If the serial numbers start in cell C2 and the Born on cells start in B2, then use this formula in cell C2 and copy down:

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I've been reading some posts here and articles around the web but I can't picture a serial keys based system for my application.

I read this one but I can't turn the code into Java and I'm not very familiar with the terms either.

What possible insight can you give me on this? Ideally my application will be for sale but I don't expect it to be much popular, I don't mind much if it gets cracked if I have users that appreciate the product and buy it, but I want to avoid it to be easily cracked. Please be as specific as you can, I'm somewhat new to Java.

Thanks in advance.

3 Answers

It's not that hard, if you're somewhat flexible in your requirements -- perhaps the scheme below would work for you.

You could just produce K = [SN, H([X,SN,Y])] which is the concatenation of an incrementing serial number with a hash, where the hash is a secure hash function of the concatenation of the serial number between unique constants X and Y that are secret 'salt' you use to prevent the use of rainbow tables.

Use a well-known secure hash algorithm (e.g. SHA-1 or SHA-2; MD5 is probably also adequate, since the known weaknesses for MD5 are collision attacks, and notpreimage attacks) and you should be all set, as least as far as the serial key part goes (you'll probably want to prevent two people from using the same key).

The other thing you can do which is helpful is use K = [SN, T, H([X, SN, T, Y])] -- use both the serial number and a timestamp. This can be used to allow only a narrow use window for the serial key: it's valid within N seconds of the timestamp, so it would prevent reuse of the key outside that window.

Then encode/decode K to a representation that can be used to easily allow users to enter the key (e.g. base64).

It's best to have a simple and transparent overall algorithm -- obfuscation is not going to help you if someone reverse-engineers your scheme.

I was quite interested in that article, so I implemented the code in Java. may be of use

Securing applications in general isn't a simple task. A lot of companies are investing a lot of money to find new securing algorithms, which get all cracked very fast.

Securing Java applications is a bit more difficult. Any serial verification algorithm embedded within your application can be decompiled, so a serial key generator will be pretty easy to build.

A good starting point is the article you gave. It tells you how to build a key verification system, and how to generate keys for your (legitimate) users.

After implementing such an algorithm, I'd suggest you to secure the source code a little, so decompilation become a little more 'tricky'. Use code obfuscation techniques to hide your verification algorithm implementation. This will also make the task harder for people trying to crack your application just by modifying byte-code.

A good technique could be to export your key verification algorithm on a remote server. The client send the key to the server, which replies with a 'validation code' to tell your application that your key is valid. But this doesn't prevents users from modifying your application to remove any key verification procedure. And this might be very annoying for legitimate users who don't have a 24-hours Internet connection. I'm thinking about Steam, which verify the key validity at every launch on Internet, and which annoys a lot of users.

To find a good protection technique, look around you and try to determine how others people do, which techniques are working, which aren't. They are a lot of example (Video game industry, in particular). But keep in mind that even the best companies aren't able to secure their applications correctly. No techniques are unbreakable.

Serial Key B2 Area 51

Serial Key B2 Area 51 Code

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