Encryption algorithm execution with Rails

Question

I have a doubt , when I develop an app that run a encryption algorithm, this algorithm run first on the client computer and the send the data to server, or is executed directly on server, enabling interception of
the plain text?

Answer 1

Go through these following links:

1. AES : http://www.brentsowers.com/2007/12/aes-encryption-and-decryption-in-ruby.html
2. EzCrypto : http://ezcrypto.rubyforge.org/
3. https://github.com/shuber/attr_encrypted

Comments

This is not what I am looking for, I want to know if encryption algo runs on client or server.