1. Is "notorious" same as "infamous"?
2. What does get around everything mean? "divert or avoid everything" or "get or gain everything"?
9)...In the 1990s, Kevin Mitnik was an infamous hacker. He hacked into government and corporate computer systems...According to Mitnick, the biggest danger to security is people. However, by this he doesn't mean hackers. In fact, he means the people using programs. "If an attacker can get one trusting person to give his or her information, the attacker get in. All that money spent is basically wasted." A hacker can get around everything with just one person within the company....
In this context "get around everything" means to avoid or defeat all the security measures an organization has put in place,
As to notorious and infamous, I'll refer you to dictionaries.