Re: Java Encryption newbie
On 14-09-2010 11:33, Marco A. Cruz Quevedo wrote:
rossum wrote:
On Sat, 11 Sep 2010 12:09:58 -0700 (PDT), "Marco A. Cruz Quevedo"
<macruzq@myway.com> wrote:
I want to develop a simple encryption program that does the following
(in pseudocode)
----
mycert = opencert("mycert.cer");
publickey pubkey = mycert.getPublicKey();
string message = readfile("MessageFile.txt");
string scrambled = encrypt(message,pubkey);
This may not be what you want to do. Public Key (asymmetric)
encryption is secure but slow. It is not generally used for large
quantities of data. It is more common to use the public key to
encrypt and send a short private key and then to use that private key
to encrypt a large volume of data using AES or some other symmetric
encryption system.
Thank you very much for your comment but in fact, the messages I need
to encrypt are less than 1Kb, so it suits my needs.
The technique suggested by rossum is usually preferred
for data sizes >32 bytes or so.
Arne
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