encrypting data using blowfish under flash

how can i encrypt data in flash? is there a toolkit or class or something that can help开发者_开发技巧 me do that ?

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as3crypto

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Don't forget about as3corelib which offers some decent implementations of common encryption schemes.

http://code.google.com/p/as3corelib/

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Have you seen this article at the Adobe Developer Connection? Other than follow the advice in the article, I don't necessarily see why you couldn't just use something like HTTPS (although, admittedly, my knowledge of Flash is limited).