Crypto Algorithm Question - Encrypted file is bigger
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I recommend using TrueCrypt instead. The majority of weaknesses in encryption are caused by implementation mistakes, and it doesn't sound like your encryption program is implemented correctly.
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Quote:
Originally Posted by E-Oreo
I recommend using TrueCrypt instead. The majority of weaknesses in encryption are caused by implementation mistakes, and it doesn't sound like your encryption program is implemented correctly.
you mean that it is cause by the mistake in source code?
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Ok, for further investigation, i can deliver a source code in PM.
To be perfectly straightforward, I'm not going to check the source code to see whether it is correct, sorry. It would simply take me too long to do that. It has been several years since I last implemented the RSA algorithm, and I probably am not familiar with the programming language in which the code is written.
If your friend is not skilled enough to tell you whether the code is correct or not, then you shouldn't trust them to write an encryption program. If you don't trust your friend to tell you whether it is correct or not, then you shouldn't trust them to write an encryption program.
There are very few good reasons to make your own implementation of RSA. All major programming languages have standard, trusted libraries that can perform RSA encryption correctly and securely. Ask your friend to use those instead of implementing their own.
My observations about the correctness of your friends program is based solely on my experience with TrueCrypt. In TrueCrypt, I can create a 10MB container volume and put 9.74MB of data into it. So there is some overhead, but it's not very significant.
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