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39 results about "Substitute character" patented technology

A substitute character (␚) is a control character that is used in the place of a character that is recognized to be invalid or erroneous, or that cannot be represented on a given device. It is also used as an escape sequence in some programming languages.

Complementary Character Encoding for Preventing Input Injection in Web Applications

Method to prevent the effect of web application injection attacks, such as SQL injection and cross-site scripting (XSS), which are major threats to the security of the Internet. Method using complementary character coding, a new approach to character level dynamic tainting, which allows efficient and precise taint propagation across the boundaries of server components, and also between servers and clients over HTTP. In this approach, each character has two encodings, which can be used to distinguish trusted and untrusted data. Small modifications to the lexical analyzers in components such as the application code interpreter, the database management system, and (optionally) the web browser allow them to become complement aware components, capable of using this alternative character coding scheme to enforce security policies aimed at preventing injection attacks, while continuing to function normally in other respects. This approach overcomes some weaknesses of previous dynamic tainting approaches by offering a precise protection against persistent cross-site scripting attacks, as taint information is maintained when data is passed to a database and later retrieved by the application program. The technique is effective on a group of vulnerable benchmarks and has low overhead.
Owner:POLYTECHNIC INSTITUTE OF NEW YORK UNIVERSITY

Character string input method and device

ActiveCN103699233AImprove input efficiencySolve the problem that the correct input cannot be effectively promptedInput/output processes for data processingKey pressingAlgorithm
The invention discloses a character string input method and a character string input device. The method comprises the following steps of: acquiring an input character corresponding to an input instruct; acquiring a substitute character corresponding to the input character; adding the input character into a current character string; acquiring the input character and the substitute character of the input character in the current character string; generating an approximate character string corresponding to the current character string; calculating a first weight value of the approximate character string; acquiring a second weight value of the approximate character string according to difference between the approximate character string and a standard character string in a word database; calculating a total weight value of the approximate character string; sequencing the approximate character string; and displaying the approximate character string according to a sequence result. According to the method and device, correct input character string can be still acquired from selectable character string options even due to clicking or contacting other keys around an expected key by mistake during character string input at a client.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD

Character string input method and input device

ActiveCN103699233BImprove input efficiencySolve the problem that the correct input cannot be effectively promptedInput/output processes for data processingAlgorithmTheoretical computer science
The invention discloses a character string input method and a character string input device. The method comprises the following steps of: acquiring an input character corresponding to an input instruct; acquiring a substitute character corresponding to the input character; adding the input character into a current character string; acquiring the input character and the substitute character of the input character in the current character string; generating an approximate character string corresponding to the current character string; calculating a first weight value of the approximate character string; acquiring a second weight value of the approximate character string according to difference between the approximate character string and a standard character string in a word database; calculating a total weight value of the approximate character string; sequencing the approximate character string; and displaying the approximate character string according to a sequence result. According to the method and device, correct input character string can be still acquired from selectable character string options even due to clicking or contacting other keys around an expected key by mistake during character string input at a client.
Owner:BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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