Abstract: Systems and methods for mutual encryption of network nodes are described. One described method includes transmitting a communication from a client to a server, the communication associated with a credential, the credential having a user identifier and a first token and receiving the communication at the server. The method further includes determining a second token associated with the user identifier on the server and on the client and generating an encryption key based at least in part on the second token on the server and on the client. The method further includes generating and encrypting an encrypted authentication request on the client; transmitting the encrypted authentication request to the server; receiving the encrypted authentication request on the server; decrypting the encrypted authentication request using the encryption key on the server; generating and encrypting an encrypted authentication response on the server; and transmitting the encrypted authentication response to the client.

Abstract: Methods and systems for securely requesting, retrieving, sending, and storing files. One aspect involves receiving a request for a file from a client device that identifies a user and the client device, encrypting the file using a session key based at least in part on the user and the client device, and transmitting the encrypted file to the client device. Other aspects of the invention include storing the encrypted file on the client device in encrypted form such that the file may only be decrypted or accessed by the particular user on that particular client device.