Method and system for copy protection of data content

• US 20010029582A1
• Filed: 01/29/2001
• Published: 10/11/2001
• Est. Priority Date: 05/17/1999
• Status: Abandoned Application

• Current Assignee: Kioba Processing, LLC (IP Investments Group LLC)
• Original Assignee: Kioba Processing, LLC (IP Investments Group LLC)
• Inventors: Schreiber, Daniel, Goodman, Daniel Isaac
• Application Number:
  US09/774,236
• Publication Number:
  US 20010029582A1
• Time in Patent Office: Days
• US Class Current: 713/193
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/84 output devices, e.g. displays or monitors

Abstract

A method for protecting content within a page displayed by a Computer, including identifying a designated portion of original content contained within a page, to be protected, encrypting the designated portion of original content to form a portion of encrypted content, replacing the designated portion of original content within the page with the portion of encrypted content, rendering the page into a graphics device, including decrypting the portion of encrypted content, and displaying at least a portion of data from the graphics device. A system is also described and claimed.

Claims

1. A method for protecting content within a page displayed by a computer, comprising:

identifying a designated portion of original content contained within a page, to be protected;

encrypting the designated portion of original content to form a portion of encrypted content;

replacing the designated portion of original content within the page with the portion of encrypted content;

rendering the page into a graphics device, comprising decrypting the portion of encrypted content; and

displaying at least a portion of data from the graphics device.

2. The method of

claim 1

wherein the page is a web page.

3. The method of

claim 2

wherein the web page is an HTML page.

4. The method of

claim 2

wherein the web page is an XML page.

5. The method of

claim 1

wherein the page is part of a document produced by a software application.

6. The method of

claim 1

wherein the graphics device is a memory device.

7. The method of

claim 1

wherein the graphics device is a screen device.

8. The method of

claim 1

wherein the graphics device is a graphics port.

9. The method of

claim 1

wherein the content is text content and said encrypting is based on encoding of characters.

10. The method of

claim 1

wherein the content is text content and said encrypting is based on encoding of words.

11. The method of

claim 1

wherein the content is text content and said encrypting comprises adding leading and trailing characters to flag encrypted text.

12. The method of

claim 1

wherein the content is text content and said encrypting comprises padding encrypted text so that identical words have distinct encrypted representations.

13. The method of

claim 1

wherein said rendering comprises converting content into graphics output.

14. The method of

claim 13

wherein the graphics output is raster output.

15. The method of

claim 1

wherein said identifying, said encrypting and said replacing are performed by a server computer, and wherein said rendering and said displaying are performed by a client computer connected to the server computer over a network.

16. The method of

claim 1

wherein said decrypting the portion of encrypted content occurs within a patched operating system function for outputting content.

17. The method of

claim 16

wherein the content is text content and the operating system function is a Microsoft Windows TextOut function.

18. The method of

claim 16

wherein the content is text content and the operating system function is a Macintosh DrawText function.

19. The method of

claim 1

further comprising formatting the page to determine a page layout.

20. The method of

claim 19

wherein the portion of encrypted content has substantially the same layout within the page as the designated portion of original content.

21. The method of

claim 19

wherein said formatting comprises decrypting encrypted content, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

22. The method of

claim 19

wherein the content is text content and said formatting comprises calculating widths of character strings.

23. The method of

claim 22

wherein said formatting comprises decrypting encrypted text strings, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

24. The method of

claim 23

wherein said decrypting encrypted text strings occurs within a patched operating system function for determining widths of character strings.

25. The method of

claim 24

wherein the operating system function is a Microsoft Windows GetTextExtent function.

26. A system for protecting content within a page displayed by a computer, comprising:

a parser identifying a designated portion of original content contained within a page, to be protected;

an encoder encrypting the designated portion of original content to form a portion of encrypted content;

an editor replacing the designated portion of original content with the portion of encrypted content, within the page;

a graphics device;

a page renderer rendering the page into said graphics device, comprising a content decoder decrypting the portion of encrypted content; and

a display device displaying at least a portion of data from said graphics device.

27. The system of

claim 26

wherein the page is a web page.

28. The system of

claim 27

wherein the web page is an HTML page.

29. The system of

claim 27

wherein the web page is an XML page.

30. The system of

claim 26

wherein the page is part of a document produced by a software application.

31. The system of

claim 26

wherein said graphics device is a memory device.

32. The system of

claim 26

wherein said graphics device is a screen device.

33. The system of

claim 26

wherein said graphics device is a graphics port.

34. The system of

claim 26

wherein the content is text content and said encoder performs encoding of characters.

35. The system of

claim 26

wherein the content is text content and said encoder performs encoding of words.

36. The system of

claim 26

wherein the content is text content and said encoder adds leading and trailing characters to flag encrypted text.

37. The system of

claim 26

wherein the content is text content and said encoder pads encrypted text so that identical words have distinct encrypted representations.

38. The system of

claim 26

wherein said page renderer comprises an output processor converting content into graphics output.

39. The system of

claim 38

wherein the graphics output is raster output.

40. The system of

claim 26

wherein said parser, said encoder and said editor reside on a server computer, wherein said graphics device and said page renderer reside on a client computer, and wherein said display device is connected to the client computer, the system further comprising network connectors connecting the client computer to the server computer.

41. The system of

claim 26

wherein said content decoder operates within a patched operating system function for outputting content.

42. The system of

claim 41

wherein the content is text content and the operating system function is a Microsoft Windows TextOut function.

43. The system of

claim 41

wherein the content is text content and the operating system function is a Macintosh DrawText function.

44. The system of

claim 26

further comprising a page formatter formatting the page to determine a page layout.

45. The system of

claim 44

wherein the portion of encrypted content has substantially the same layout within the page as the designated portion of original content.

46. The system of

claim 44

wherein said page formatter comprises a decoder, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

47. The system of

claim 44

wherein the content is text content and s aid page formatter comprises a string analyzer calculating widths of character strings.

48. The system of

claim 47

wherein said page formatter comprises a string decoder decrypting encrypted text strings, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

49. The system of

claim 48

wherein said string decoder operates within a patched operating system function for determining widths of character strings.

50. The system of

claim 49

wherein the operating system function is a Microsoft Windows GetTextExtent function.

51. A method for protecting content contained within a page displayed by a computer, comprising:

accessing a page containing a portion of encrypted content;

rendering the page into a graphics device, comprising decrypting the portion of encrypted content; and

displaying at least a portion of data from the graphics device.

52. The method of

claim 51

wherein the page is a web page.

53. The method of

claim 52

wherein the web page is an HTML page.

54. The method of

claim 52

wherein the web page is an XML page.

55. The method of

claim 51

wherein the page is part of a document produced by a software application.

56. The method of

claim 51

wherein the graphics device is a memory device.

57. The method of

claim 51

wherein the graphics device is a screen device.

58. The method of

claim 51

wherein the graphics device is a graphics port.

59. The method of

claim 51

wherein said rendering comprises converting content into graphics output.

60. The method of

claim 59

wherein the graphics output is raster output.

61. The method of

claim 51

wherein said decrypting the portion of encrypted content occurs within a patched operating system function for outputting content.

62. The method of

claim 61

wherein the content is text content and the operating system function is a Microsoft Windows TextOut function.

63. The method of

claim 61

wherein the content is text content and the operating system function is a Macintosh DrawText function.

64. The method of

claim 51

further comprising formatting the page to determine a page layout.

65. The method of

claim 64

wherein the portion of encrypted content has substantially the same layout within the page as the portion of decrypted content.

66. The method of

claim 64

wherein said formatting comprises decrypting encrypted content, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

67. The method of

claim 64

wherein the content is text content and said formatting comprises calculating widths of character strings.

68. The method of

claim 67

wherein said formatting comprises decrypting encrypted text strings, to ensure that the page layout corresponds to a layout for a page containing the portion of decrypted content.

69. The method of

claim 68

wherein said decrypting encrypted text strings occurs within a patched operating system function for determining widths of character strings.

70. The method of

claim 67

wherein the operating system function is a Microsoft Windows GetTextExtent function.

71. The method of

claim 51

further comprising receiving the page having a portion of encrypted content from a server computer.

72. A system for protecting content contained within a page displayed by a computer, comprising:

computer hardware storing a page containing a portion of encrypted content;

a graphics device;

a page renderer rendering the page into said graphics device, comprising a content decoder decrypting the portion of encrypted content; and

a display device displaying at least a portion of data from said graphics device.

73. The system of

claim 72

wherein the page is a web page.

74. The system of

claim 73

wherein the web page is an HTML page.

75. The system of

claim 73

wherein the web page is an XML page.

76. The system of

claim 72

wherein the page is part of a document produced by a software application.

77. The system of

claim 72

wherein said graphics device is a memory device.

78. The system of

claim 72

wherein said graphics device is a screen device.

79. The system of

claim 72

wherein said graphics device is a graphics port.

80. The system of

claim 72

wherein said page renderer comprises an output processor converting content into graphics output.

81. The system of

claim 80

wherein the graphics output is raster output.

82. The system of

claim 72

wherein said content decoder operates within a patched operating system function for outputting content.

83. The system of

claim 82

wherein the content is text content and the operating system function is a Microsoft Windows TextOut function.

84. The system of

claim 82

wherein the content is text content and the operating system function is a Macintosh DrawText function.

85. The system of

claim 72

further comprising a page formatter formatting the page to determine a page layout.

86. The system of

claim 85

wherein the portion of encrypted content has substantially the same layout within the page as the portion of decrypted content.

87. The system of

claim 85

wherein said page formatter comprises a decoder, to ensure that the page layout corresponds to a layout for a page containing the designated portion of original content.

88. The system of

claim 85

wherein the content is text content and said page formatter comprises a string analyzer calculating widths of character strings.

89. The system of

claim 88

wherein said page formatter comprises a string decoder decrypting encrypted text strings, to ensure that the page layout corresponds to a layout for a page containing the portion of decrypted content.

90. The system of

claim 89

wherein said string decoder operates within a patched operating system function for determining widths of character strings.

91. The system of

claim 90

wherein the operating system function is a Microsoft Windows GetTextExtent function.

92. The system of

claim 72

further comprising:

a network connector; and

a receiver receiving the page having a portion of encrypted content from a server computer via said network connector.

93. A method for protecting content contained within a page displayed by a computer, comprising:

identifying a designated portion of original content within a page, to be protected;

encrypting the designated portion of original content to form a portion of encrypted content; and

replacing the designated portion of original content within the page with the portion of encrypted content.

94. The method of

claim 93

wherein the page is a web page.

95. The method of

claim 94

wherein the web page is an HTML page.

96. The method of

claim 94

wherein the web page is an XML page.

97. The method of

claim 93

wherein the page is part of a document produced by a software application.

98. The method of

claim 93

wherein the content is text content and said encrypting is based on encoding of characters.

99. The method of

claim 93

wherein the content is text content and said encrypting is based on encoding of words.

100. The method of

claim 93

wherein the content is text content and said encrypting comprises adding leading and trailing characters to flag encrypted text.

101. The method of

claim 93

wherein the content is text content and said encrypting comprises padding encrypted text so that identical words have distinct encrypted representations.

102. The method of

claim 93

wherein the portion of encrypted content has substantially the same layout within the page as the designated portion of original content.

103. The method of

claim 93

further comprising transmitting the page with the portion of encrypted content to a client computer.

104. A system for protecting content contained within a page displayed by a computer, comprising:

a parser identifying a designated portion of original content within a page, to be protected;

an encoder encrypting the designated portion of original content to form a portion of encrypted content; and

an editor replacing the designated portion of content with the portion of encrypted content, within the page.

105. The system of

claim 104

wherein the page is a web page.

106. The system of

claim 105

wherein the web page is an HTML page.

107. The system of

claim 105

wherein the web page is an XML page.

108. The system of

claim 104

wherein the page is part of a document produced by a software application.

109. The system of

claim 104

wherein the content is text content and said encoder performs encoding of characters.

110. The system of

claim 104

wherein the content is text content and said encoder performs encoding of words.

111. The system of

claim 104

wherein the content is text content and said encoder adds leading and trailing characters to flag encrypted text.

112. The system of

claim 104

wherein the content is text content and said encoder pads encrypted text so that identical words have distinct encrypted representations.

113. The system of

claim 104

wherein the portion of encrypted content has substantially the same layout within the page as the designated portion of original content.

114. The system of

claim 104

further comprising:

a network connector; and

a transmitter transmitting the page with the portion of encrypted content to a client computer via said network connector.

115. A method for protecting text within a page displayed by a computer, comprising:

formatting a page containing a first portion of text to determine a page layout; and

rendering the page according to the page layout into a graphics device, comprising;

replacing the first portion of text with a second portion of text;

converting the second portion of text to a graphics output; and

writing the graphics output into the graphics device.

116. The method of

claim 115

wherein the first portion of text has the same word widths as does the second portion of text.

117. The method of

claim 115

wherein the graphics output is raster output.

118. The method of

claim 115

wherein said replacing the first portion of text with a second portion of text occurs within a patched operating system function for converting text into graphics output.

119. The method of

claim 118

wherein the operating system function is a Microsoft Windows TextOut function.

120. The method of

claim 118

wherein the operating system function is a Macintosh DrawText function.

121. The method of

claim 115

wherein said formatting comprises:

replacing first text strings with second text strings; and

calculating widths of the second text strings based on selected font types and font sizes.

122. The method of

claim 121

wherein said replacing first text strings with second text strings occurs within a patched operating system function for determining widths of character strings.

123. The method of

claim 122

wherein the operating system function is a Microsoft Windows GetTextExtent function.

124. A system for protecting text within a page displayed by a computer, comprising:

a page formatter formatting a page containing a first portion of text to determine a page layout; and

a page renderer rendering the page according to the page layout into a graphics device, comprising;

a text processor replacing the first portion of text with a second portion of text; and

a text convertor converting the second portion of text to a graphics output and writing the graphics output into the graphics device.

125. The system of

claim 124

wherein the first portion of text has the same word widths as does the second portion of text.

126. The method of

claim 124

wherein the graphics output is raster output.

127. The system of

claim 124

wherein said text processor operates within a patched operating system function for converting text into graphics output.

128. The system of

claim 127

wherein the operating system function is a Microsoft Windows TextOut function.

129. The system of

claim 127

wherein the operating system function is a Macintosh DrawText function.

130. The system of

claim 124

wherein said formatter comprises:

a string processor replacing first text strings with second text strings; and

a string analyzer calculating widths of the second text strings based on selected font types and font sizes.

131. The system of

claim 130

wherein said string processor operates within a patched operating system function for determining widths of character strings.

132. The system of

claim 131

wherein the operating system function is a Microsoft Windows GetTextExtent function.

133. A method for protecting content within a page displayed by a computer, comprising:

encrypting a designated portion of original content contained within a page to form a portion of encrypted content;

replacing the designated portion of original content within the page with the portion of encrypted content; and

decrypting the portion of encrypted content when rendering the page into a graphics device.

134. The method of

claim 133

further comprising decrypting an encrypted string when formatting the page to determine a page layout.

135. A system for protecting content within a page displayed by a computer, comprising:

an encoder encrypting a designated portion of original content contained within a page to form a portion of encrypted content;

an editor replacing the designated portion of original content with the portion of encrypted content, within the page; and

a content decoder decrypting the portion of encrypted content when rendering the page into a graphics device.

136. The system of

claim 135

further comprising a string decoder decrypting an encrypted string when formatting the page to determine a page layout.

137. A method for protecting content contained within a page displayed by a computer, comprising:

accessing a page containing a portion of encrypted content; and

decrypting the portion of encrypted content when rendering the page into a graphics device.

138. The method of

claim 137

further comprising decrypting an encrypted string when formatting the page to determine a page layout.

139. A system for protecting content contained within a page displayed by a computer, comprising:

computer hardware storing a page containing a portion of encrypted content; and

a content decoder decrypting the portion of encrypted content when rendering the page into a graphics device.

140. The system of

claim 139

further comprising a string decoder decrypting an encrypted string when formatting the page to determine a page layout.

141. A method for protecting text within a page displayed by a computer, comprising:

replacing first text strings with second text strings when formatting a page to determine a page layout; and

replacing a first portion of text with a second portion of text when rendering the page according to the page layout into a graphics device.

142. A system for protecting text within a page displayed by a computer, comprising:

a string processor replacing first text strings with second text strings when formatting a page to determine a page layout; and

a text processor replacing a first portion of text with a second portion of text when rendering the page according to the page layout into a graphics device.