Trustwave Holdings Inc

Alexander Yermakov

Mark Kaplan

Blocking transmission of tainted data using dynamic data tainting is described. For example, sensitive information is stored on a client device as tainted data. The client device generates a data request for retrieving data from a non-trusted entity via a network. A gateway is communicatively coupled to the client device and the network. The gateway receives computer code from the non-trusted entity via the network. The gateway executes the computer code. The gateway tracks the execution of the computer code to determine whether the computer code attempts to access tainted data and transmit the tainted data to an outside entity. The gateway blocks the transmission of the tainted data to the outside entity responsive to determining that the computer code has attempted to access tainted data and transmit the tainted data to an outside entity.

System and method for blocking the transmission of sensitive data using dynamic data tainting

Analyzing computer code using a tree is described. For example, a client device generates a data request for retrieving data from a non-trusted entity via a network. A gateway is communicatively coupled to the client device and to the network. The gateway is configured to receive computer code from the non-trusted entity via the network. The gateway builds a tree representing the computer code. The tree has one or more nodes. A node of the tree represents a statement from the computer code. The gateway analyzes the statement to identify symbol data. The symbol data describes a name of the variable and the value of the variable. The gateway stores the symbol data in a symbol table.

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Ashkelon, Israel

Alexander Yermakov