Passwords secure the vast majority of systems today. This time-tested approach does provide adequate security for many purposes, but also has potential drawbacks. Attackers can wage attacks designed to crack passwords stored in system files. Many recent attacks used this approach to steal massive numbers of user accounts. In this video, Mike Chapple explains common attacks against passwords, including brute force attacks, dictionary attacks, hybrid attacks, and rainbow tables.
- [Instructor] Passwords secure access…to the vast majority of systems today.…This time test approach does provide…adequate security for many purposes,…but also has potential drawbacks.…Attackers can wage attacks designed…to crack passwords stored in system files.…Many recent attacks used this approach…to steal massive numbers of user accounts.…Let's take a look at some password attacks.…On Linux systems password files…contain user credentials.…When a user attempts to login to a system,…the login process checks the password file…to determine whether the password is valid.…
Now, of course, the file doesn't simply…contain a copy of the password.…That would be an easy target for attackers…and would also allow system administrators…to know all of the user password on a system.…Instead, the password file contains a password hash,…shown here, computed using a one way hash function.…When the user logs in, the login process…takes the password, computes a hash…and then, compares that hash…with the one stored in the file.…
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- Comparing viruses, worms, and Trojans
- Backdoors and logic bombs
- Understanding the attacker
- Attack types: from denial of service to brute force attacks
- Preventing insider threats
- Wireless attacks
- Understanding cross-site scripting
- Preventing SQL injection
- Social engineering
- Scanning for vulnerabilities
- Penetration testing
- Assessing the impact of vulnerabilities
Skill Level Beginner
2. Understanding Attackers
3. Understanding Attack Types
4. Wireless Attacks
5. Application Attacks
6. Social Engineering Attacks
7. Vulnerability Scanning and Penetration Testing
8. Impact of Vulnerabilities
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