Methods and systems for securely routing documents through third party infrastructures

A system may include a device having a program that includes a workflow system public key associated with a workflow system and programming instructions that allow the device to communicate with the workflow system over a communication network. The system may initialize a device by sending communications to the workflow system, receiving a response that includes information encrypted with a workflow system private key, and verifying the authenticity of the response by using the workflow system public key to decrypt the information in the response. The system may register the device for privacy treatment by the workflow system by generating a key pair that includes a client private key and a client public key, generating an encrypted client key by encrypting the client public key with the workflow system public key, including the encrypted client key in a privacy request, and sending the privacy request to the workflow system.