Microsoft Technology Licensing, LLC

Muhammed Serdar Soran

Tolga Acar

David Charles LeBlanc

Adam D Barr

Brian Thomas Carver

Thomas P Gallagher

Matthew Michael Swann

Samantha Schumacher

Venkataramann Renganathan

Trace David Ferrier

Ray S Wang

Concepts and technologies are described herein for sharing encrypted data with enhanced security. In some configurations, an encryption key is generated from a password by the use of a password-based key generation technology. In addition, input data is encrypted using the encryption key. The encrypted data and the generated key may be then shared with a remote computer, such as a server. The encrypted data can then be decrypted at the remote computer by the use of the key. By the use of the technologies described herein, the contents of an encrypted file may be accessed at a remote computer without requiring a user to share the actual password.

Sharing encrypted data with enhanced security by removing unencrypted metadata

A canary value is used to validate a message from a non-web browser client application to a web server providing web services to mitigate cross-site forgery attacks. The canary value is generated by the server in party by applying a hash function to a user identifier and a time stamp. The server provides the canary value to the client application in response to receiving a message that does not have a canary or has an expired canary. The client application upon receiving an error message with a canary message will resend the prior message with the canary value present. The client application caches the canary value for subsequent messages until a new canary value is received. The canary value allows the server to ignore messages generated by the client application under control of an attacker.

Dynamic cross-site request forgery protection in a web-based client application

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Muhammed Serdar Soran