Research Article
A Fragile Zero Watermarking Scheme to Detect and Characterize Malicious Modifications in Database Relations
Algorithm 4
Range sub-watermark generation.
| range = {0–99, 100–999, 1000–9999, 10000–99999, 100000–999999} | | For Each tuple relation do | | For Each attribute relation do | |
| | Select Case x | | in range 0: range_frequency++ | | in range 1: range_frequency++ | | in range 2: range_frequency++ | | in range 3: range_frequency++ | | in range 4: range_frequency++ | |
End Select | | total_range_count++ | | End For | | End For | | For Each range do | | = (range_frequency/total_range_count) * 100 | | | | End For | | total_range_count | | Return |
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