A network security module for protecting computing devices connected to a communication network from identified security threats communicated in a secured communication is presented. The network security module is interposed, either logically or physically, between the protected computer and the communication network. Upon detecting a secured communication, the network security module obtains a decryption key from the computing device to decrypt the secured communication. The network security module then processes the decrypted communication according to whether the decrypted communication violates protective security measures implemented by the network security module.