Zend Preparation
  • Study Guide
  • E-Books
  • Practice Quiz
  • LeaderBoard
  • Login
  • Register
Security Learning Mode
Qusetions Index 91/185
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185

You authenticate client-controlled data using an HMAC with a secret key. If the MAC does not match you reject the message. Which of the following can be used to make sure your application will not leak exploitable timing information in the following string comparison: if (mac_from_client != secret) error()?


HMAC (using the secret key) both the strings mac_from_client and secret before comparison
Correct: HMAC (using the secret key) both the strings mac_from_client and secret before comparison
Previous
Next