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In the world of cyber security, it is essential for businesses and individuals alike to stay informed about the latest hacking techniques used by malicious actors. One such technique is SQL injection, which allows attackers to exploit vulnerabilities in web applications and gain access to sensitive data. Two common variations of SQL injection are '1-1)) or 573=(select 573 from pg_sleep(15))--' and 'SELECT * FROM table_name--'. Let's take a deeper look at how these two techniques compare.

First, let's understand what these SQL injection strings mean. The 1-1)) or 573=(select 573 from pg_sleep(15))-- technique involves using the 'OR' operator, which allows attackers to bypass the authentication process of a web application. By inputting this string in a login form, the attacker is essentially saying 'allow entry if the first condition is not met OR if the second condition returns true'. In this case, the first condition (1-1) is always true, and the second condition will execute a 'sleep' command, causing a delay in the application's response.

The second technique, SELECT * FROM table_name--, involves using a comment symbol (--) to disable the rest of the SQL query. This effectively renders the login validation process useless, allowing attackers to log in without a valid username or password. By using the 'SELECT *' command, the attacker can also retrieve all the data from the targeted database. This technique is considered more advanced as it requires some knowledge of the database's structure.

So, which technique is more dangerous? It ultimately depends on the vulnerability in the web application. The 1-1)) or 573=(select 573 from pg_sleep(15))-- technique can easily be detected and prevented by implementing proper input validation. On the other hand, the SELECT * FROM table_name-- technique can be more difficult to detect and prevent, as it exploits a vulnerability in the application's code rather than the input field.

In summary, both of these SQL injection techniques are highly dangerous and can lead to severe consequences if not addressed appropriately. It is essential for developers and businesses to stay vigilant and regularly update and secure their web applications to prevent such attacks. Educating oneself about different hacking techniques is also crucial for individuals to protect their personal information. Stay informed and stay safe!