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    Another important point is that asymmetric encryption implies an increase in data length. For instance, if you use RSA, encrypted data is at least 10% larger than the cleartext. Symmetric encryption, on the other hand, has a fixed size overhead even when encrypting gigabytes of data. Commented May 8, 2011 at 12:06
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    asymetric encryption is about 1000 times slower, according to B.Schneier. math.uchicago.edu/~mann/encryption.pdf Commented Nov 27, 2014 at 8:52
  • @ThomasPornin, Isn't that also part of point number 1? Commented Mar 28, 2015 at 21:04
  • @AviD, So are your three points basically saying 1) it's slow, 2) it's slow, and 3) it's slow Commented Mar 28, 2015 at 21:06
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    @Pacerier heh, no, I would say more 1) overhead, 2) not as strong, and 3) overhead :-) Commented Mar 29, 2015 at 7:45