Hi!

I hope someone on this newsgroup can help me. I'm developing an 
extension for Mozilla 1.0, and I need to read and write encrypted data 
to disk. Only my extension needs (or should be able) to read it. But it 
should be a strong encryption, because the scores of a student will be 
recorded and saved for transmit later, and we don't want the user to be 
able to alter that score.

Since there is a lot of security stuff in the mozilla code already, I 
thought I could reuse that. But unfortunatly, I don't have a clue where 
to start. I've tried to search on the mozilla homepage, but I couldn't 
find an easy to read introduction to crypto.

Could someone give me an example of how to encrypt and decrypt a block 
of bytes?

bye,
Markus


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