https://techofide.com/blogs/advanced-sql-injection-attack-sqli-blind-sql-injection-and-prevention/
https://medium.com/@pranshux0x/super-blind-sql-injection-20000-bounty-thousands-of-targets-still-vulnerable-f9b013765448
처음 배울 때 제일 헷갈렸던 개념 (2021.01.15.)
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