Abstract: A messaging and content sharing platform that allows for sender-controlled permissions and rules. During operation, a sending device can receive user input to set permissions and rules for an object to be sent to a receiving device. The permissions and rules control how the object will be managed after leaving the sending device. A receiving device receives the object and complies with the permissions and rules associated with the object. Other features of the platform include a hierarchical view for group messaging, an attachment-only view of messages, large file attachments, and the ability to allow users to access external services such as social networking websites without logging in.

Abstract: Systems and methods are disclosed permitting a sender to send a secret and secure message to a recipient. An application on a sender device interfaces with known message generating tools to permit a user to generate a message. The local application encrypts the message (and optional attachments) based on public/private key pairing negotiated with the server given the recipient device id. The sender device transmits the cipher text to the server. The server generates a benign, text-based, context-appropriate message and delivers same to a recipient device by way of a known messaging service. The benign message provides a secret clue to the recipient that an encrypted message is available. Recipient may then access and decrypt the encrypted message, such as from the server in response to a successful challenge (e.g., password request).

Abstract: A messaging and content sharing platform that allows for sender-controlled permissions and rules. During operation, a sending device can receive user input to set permissions and rules for an object to be sent to a receiving device. The permissions and rules control how the object will be managed after leaving the sending device. A receiving device receives the object and complies with the permissions and rules associated with the object. Other features of the platform include a hierarchical view for group messaging, an attachment-only view of messages, large file attachments, and the ability to allow users to access external services such as social networking websites without logging in.

Abstract: One embodiment provides a system that facilitates secure communication between a sending device and a receiving device. During operation, the system receives, at the receiving device, a benign message sent over a communication channel from the sending device. Next, the system computes a digest from the benign message by hashing the benign message. The system then queries a cover message server with the computed digest to determine whether the benign message indicates that an encrypted message is available at a secure message server. Subsequently, the system obtains the encrypted message from the secure message server, responsive to determining that the benign message indicates that the encrypted message is available at the secure message server.

Abstract: Systems and methods are disclosed permitting a sender to send a secret and secure message to a recipient. An application on a sender device interfaces with known message generating tools to permit a user to generate a message. The local application encrypts the message (and optional attachments) based on public/private key pairing negotiated with the server given the recipient device id. The sender device transmits the cipher text to the server. The server generates a benign, text-based, context-appropriate message and delivers same to a recipient device by way of a known messaging service. The benign message provides a secret clue to the recipient that an encrypted message is available. Recipient may then access and decrypt the encrypted message, such as from the server in response to a successful challenge (e.g., password request).