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by dvdkhlng
2027 days ago
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They are are using a 53-bit hash cyrb53 [1] of the string "IP address + website domain + user agent + language + validity days". It looks feasible that many of the generated IDs could be retroactively brute-force mapped back to an IPv4 address with high confidence (small chance of error due to hash collisions). [1] https://stackoverflow.com/questions/7616461/generate-a-hash-... |
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