Created
December 24, 2012 22:10
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constant-time algorithm for string comparing in Python. This is a refactoring of a snippet found in http://codahale.com/a-lesson-in-timing-attacks/ to work with strings.
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| def is_equal(a, b): | |
| result = 0 | |
| for x, y in zip(a, b): | |
| result |= ord(x) ^ ord(y) | |
| return result == 0 |
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