license-key | 易学教程

Using jar signing as a kind of license key

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问题 Related to this question, can / should I use jar signing to create a tamper proof jar with information embedded for run-time enforcement of the number of users allowed to use the application? My idea is this: Create jar with single class containing static field holding the right number of users Sign the jar and place in Grails war lib folder so on classpath (Assumption, is this correct?) I can access the the static field in the class in the signed jar file from my grails application safely

How to programatically remove the Windows product key from registry in .NET?

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问题 How could I programatically remove the Windows product key from registry in .NET (C# or VB.NET) to reproduce the same effect as when calling the Microsoft's legit slmgr.vbs script file with the /cpky argument?... so please do not misunderstand in my question "remove" for "uninstall". I just want to remove the bytes that correspond to the product key of Windows that is stored and encoded in the HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion : DigitalProductId registry value, so the product

License scheme, spoof-safe and revoke capabilities

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问题 this is my first question so please be gentle... I am working on a software which I would like to protect using some kind of licensing scheme. A basic scheme would be to generate some "unique" key for a user. The user sends this key and a registration code when he wants to register the software and receives an activation code. When the application runs it validates the activation code by comparing the "unique" key and a datablob received by decrypting the activation code. This is fair and

License key pattern detection?

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问题 This is not a real situation; please ignore legal issues that you might think apply, because they don't. Let's say I have a set of 200 known valid license keys for a hypothetical piece of software's licensing algorithm, and a license key consists of 5 sets of 5 alphanumeric case-insensitive (all uppercase) characters. Example: HXDY6-R3DD7-Y8FRT-UNPVT-JSKON Is it possible (or likely) to extrapolate other possible keys for the system? What if the set was known to be consecutive; how do the

USB software protection dongle for Java with an SDK which is cross-platform “for real”. Does it exist?

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问题 What I'd like to ask is if anybody knows about an hardware USB-dongle for software protection which offers a very complete out-of-the-box API support for cross-platform Java deployments. Its SDK should provide a jar (only one, not one different library per OS & bitness) ready to be added to one's project as a library. The jar should contain all the native stuff for the various OSes and bitnesses From the application's point of view, one should continue to write (api calls) once and run

How to use public encryption to manage licensing on android applications?

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问题 I don't want to publish my app on Android Market, but i would create a license key from my website based on the MAC address of the user device. It should include also expiration date. Once the user enters the code in the android device it should be recognised. I've read that it can be done by using custom public encryption. In this scenario i should implement: A function in my application that takes the MAC address of the device and shows a string to the user. A function on my website that

Google MAPs API for android limit 2500 requests/day is per client device or per application key?

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问题 Sorry, I found similar questions - but not the answers: only discussions. I'm developing android application which is intended to place points and draw routes on map. In case Google limits using of their maps 2500 r/day per key - there is no way to use it, since even in case your application was once sold - you'll need to pay every month for every additional 1000 req/day. Especially it is unclear for free application: how much it will cost for 100000 downloads per month after 1 year? Please,

USB software protection dongle for Java with an SDK which is cross-platform “for real”. Does it exist?

阅读更多关于 USB software protection dongle for Java with an SDK which is cross-platform “for real”. Does it exist?

What I'd like to ask is if anybody knows about an hardware USB-dongle for software protection which offers a very complete out-of-the-box API support for cross-platform Java deployments. Its SDK should provide a jar (only one, not one different library per OS & bitness) ready to be added to one's project as a library. The jar should contain all the native stuff for the various OSes and bitnesses From the application's point of view, one should continue to write (api calls) once and run everywhere, without having to care where the end-user will run the software The provided jar should itself

How to use public encryption to manage licensing on android applications?

阅读更多关于 How to use public encryption to manage licensing on android applications?

I don't want to publish my app on Android Market, but i would create a license key from my website based on the MAC address of the user device. It should include also expiration date. Once the user enters the code in the android device it should be recognised. I've read that it can be done by using custom public encryption. In this scenario i should implement: A function in my application that takes the MAC address of the device and shows a string to the user. A function on my website that owns the private key and cipher the string at point 1. and adds expiration date A function in my

Google MAPs API for android limit 2500 requests/day is per client device or per application key?

阅读更多关于 Google MAPs API for android limit 2500 requests/day is per client device or per application key?

Sorry, I found similar questions - but not the answers: only discussions. I'm developing android application which is intended to place points and draw routes on map. In case Google limits using of their maps 2500 r/day per key - there is no way to use it, since even in case your application was once sold - you'll need to pay every month for every additional 1000 req/day. Especially it is unclear for free application: how much it will cost for 100000 downloads per month after 1 year? Please, share your experience (not your assumptions). Thanks. use of the Google Places API for Android request