Knowledge-based attacks go beyond the simplicity of brute force attacks and combine other information available to the attacker with cryptanalytic techniques to break the security of encrypted data. In this video, learn how attackers wage knowledge-based attacks against encryption algorithms.
- [Narrator] Knowledge-based attacks…go beyond the simplicity of brute-force attacks.…And combine other information available to the attacker,…with cryptanalytic techniques,…to break the security of encrypted data.…The first knowledge-based attack…is the Frequency Analysis Attack.…In this attack, the person trying to break the code…does statistical analysis of the ciphertext…to try to detect patterns.…The analyst might use many common characteristics,…of the English language, to help with this analysis.…
For example, you might know that the most common letters…in the English language, are E, T, O, A, I and N.…If you suspect that a simple substitution cipher was used…to protect data, and see the letter X coming up repeatedly…in the cipher text, there's a good chance that X…was substituted for E.…There are also lesser known rules…that can assist with frequency analysis.…For Example, researchers also can use pairs of letters…that often appear together, known as digraphs.…
If they see the same two letters popping up in cipher text,…
- 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
IT Security Foundations: Core Conceptswith Lisa Bock1h 13m Beginner
Insights from a Cybersecurity Professionalwith Mike Chapple32m 15s Appropriate for all
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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