Abstract: A method of using a user model with salience includes providing content to a user through a user interface. The method also includes receiving physiological data corresponding to a physiological response of the user as the user interacts with the content. The method may also include determining a salience score for the content based at least in part on the physiological response of the user, and updating a user model with the salience score.

Abstract: A method of switching content based on salience data may include providing a first time-based content item to a user through a user interface. The method may also include receiving physiological data from at least one physiological sensor as the user interacts with the first time-based content item. The method may also include determining a salience score based at least in part on the physiological data. The method may also include, in the event the salience score is below a threshold value, presenting a second time-based content item to the user through the user interface.

Abstract: A method of using salience to send a content item to a social network service is provided. The method includes providing a content item to a user through a user interface and collecting physiological data of the user as the user interacts with the content item. The method also includes determining a salience score of the content item based at least in part on the physiological data. In the event the salience score is greater than a salience threshold, the method includes sending the content item to a social network service.

Abstract: A method of using a user model with salience includes providing content to a user through a user interface. The method also includes receiving physiological data corresponding to a physiological response of the user as the user interacts with the content. The method may also include determining a salience score for the content based at least in part on the physiological response of the user, and updating a user model with the salience score.

Abstract: A method of associating salience with content includes displaying a document having a plurality of content. The method also includes receiving eye tracking data corresponding to a plurality of viewing angles of an eye of a user over time as the user views at least a portion of the plurality of the content within the document on the display over time, and receiving physiological data corresponding to a physiological response of the user as the user views at least a portion of the plurality of the content within the document on the display over time. The method may also include associating at least a portion of the viewing angle data with a location of at least one of the plurality of content within the document, and associating the physiological response of the user with one or more of the plurality of content of the document using the viewing angle data.

Abstract: A method for controlling and tracking access to disseminated information involves encrypting data using a key that is maintained in a key repository. A user requests a message ID and key from the key repository. The key repository issues a message ID and key to the user. The user generates an encrypted message using the key. The encrypted message is then distributed with the message ID to one or more recipients. To read the encrypted message, a particular recipient obtains the key for the message from the key repository by providing the message ID to the key repository. The particular recipient then decrypts the message using the key provided by the key repository. Messages are deleted, in the sense of becoming unusable, by deleting the corresponding key from the key repository. A log is provided to track key repository activity including the issuance of keys and key requests from message recipients.

Abstract: In general, data exchanged between users is protected using any of various encoding approaches. An example of encoding is encryption, but any kind of encoding may be used. The data used to encrypt the data exchanged between the users, referred to as a “key”, is maintained only in a key repository. Users must obtain a key from the key repository to either encode or decode, encrypt or decrypt data, after which the user's copy of the key is destroyed or otherwise rendered inoperable. A key management policy is employed to control access to the keys maintained by the key repository. Encoding algorithms may be dynamically changed over time. Users may negotiate different algorithms to be used with specific users or messages. Thus, different algorithms may be used between different sets of users depending upon what the member users of those sets negotiate among themselves. The frequency at which algorithms are changed may also be separately negotiated between users.

Abstract: A method for controlling and tracking access to disseminated information involves encrypting data using a key that is maintained in a key repository. A user requests a message ID and key from the key repository. The key repository issues a message ID and key to the user. The user generates an encrypted message using the key. The encrypted message is then distributed with the message ID to one or more recipients. To read the encrypted message, a particular recipient obtains the key for the message from the key repository by providing the message ID to the key repository. The particular recipient then decrypts the message using the key provided by the key repository. Messages are deleted, in the sense of becoming unusable, by deleting the corresponding key from the key repository. A log is provided to track key repository activity including the issuance of keys and key requests from message recipients.