sample/app_3.2.13/config/initializers/secret_token.rb
# Be sure to restart your server when you modify this file.
# Your secret key for verifying the integrity of signed cookies.
# If you change this key, all old signed cookies will become invalid!
# Make sure the secret is at least 30 characters and all random,
# no regular words or you'll be exposed to dictionary attacks.
App3211::Application.config.secret_token = '695f88867f5bce3fe3fb4d97632c29c67e13341a249846ecd0f61cfcaeebb6ac7ab3e38a907d4dfcec77884dd13e2429e7905f27b3895792a65e47506d5f5994'