Notation.html 3.1 KB

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  6. <title>VeraCrypt - Free Open source disk encryption with strong security for the Paranoid</title>
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  34. <h1>Notation</h1>
  35. <p>&nbsp;</p>
  36. <table cellspacing="0">
  37. <tbody>
  38. <tr>
  39. <td><em>C</em></td>
  40. <td>Ciphertext block</td>
  41. </tr>
  42. <tr>
  43. <td><em>DK()</em></td>
  44. <td>Decryption algorithm using encryption/decryption key <em>K</em></td>
  45. </tr>
  46. <tr>
  47. <td><em>EK()</em></td>
  48. <td>Encryption algorithm using encryption/decryption key <em>K</em></td>
  49. </tr>
  50. <tr>
  51. <td><em>H()</em></td>
  52. <td>Hash function</td>
  53. </tr>
  54. <tr>
  55. <td><em>i</em></td>
  56. <td>Block index for n-bit blocks; n is context-dependent</td>
  57. </tr>
  58. <tr>
  59. <td><em>K</em></td>
  60. <td>Cryptographic key</td>
  61. </tr>
  62. <tr>
  63. <td><em>^</em></td>
  64. <td>Bitwise exclusive-OR operation (XOR)</td>
  65. </tr>
  66. <tr>
  67. <td><em>&oplus;</em></td>
  68. <td>Modulo 2n addition, where n is the bit size of the left-most operand and of the resultant value (e.g., if the left operand is a 1-bit value, and the right operand is a 2-bit value, then: 1 &oplus; 0 = 1; 1 &oplus; 1 = 0; 1 &oplus; 2 = 1; 1 &oplus; 3 = 0;
  69. 0 &oplus; 0 = 0; 0 &oplus; 1 = 1; 0 &oplus; 2 = 0; 0 &oplus; 3 = 1)</td>
  70. </tr>
  71. <tr>
  72. <td><em>&otimes;</em></td>
  73. <td>Modular multiplication of two polynomials over the binary field GF(2) modulo x128&#43;x7&#43;x2&#43;x&#43;1 (GF stands for Galois Field)</td>
  74. </tr>
  75. <tr>
  76. <td><em>||</em></td>
  77. <td>Concatenation</td>
  78. </tr>
  79. </tbody>
  80. </table>
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