Podcast Beta
Questions and Answers
What is the primary way viruses, worms, and Trojan Horses cause damage?
What is a buffer in the context of computer security?
What is the primary goal of the Containment Phase in worm mitigation?
What is a Trojan Horse in the context of computer security?
Signup and view all the answers
What is the usual result of a buffer overflow?
Signup and view all the answers
What is the primary responsibility of system and network administration staff in worm mitigation?
Signup and view all the answers
What is the purpose of using ACLs on routers and firewalls during the Containment Phase?
Signup and view all the answers
What is the main difference between a virus and a worm?
Signup and view all the answers
What is the purpose of the Inoculation Phase in worm mitigation?
Signup and view all the answers
What is a common software vulnerability that can be exploited by viruses, worms, and Trojan Horses?
Signup and view all the answers
Study Notes
3DES
- 3DES (Triple Data Encryption Algorithm) is an encryption algorithm
- It has three phases: encryption, decryption, and decryption
Diffie-Hellman Key Exchange
- The Diffie-Hellman algorithm is used for key exchange
- It is commonly used in IPsec VPN, SSL/TLS, and SSH
- It is not an encryption mechanism and is not used for bulk encryption
- It is used to create keys for symmetric algorithms
Symmetric vs Asymmetric Key Algorithms
- Symmetric key algorithms use the same key for encryption and decryption
- Asymmetric key algorithms use a public key for encryption and a private key for decryption
- Asymmetric algorithms provide confidentiality and authentication
Limitations of Firewalls
- Firewalls cannot protect against attacks bypassing the firewall
- Firewalls may not protect against internal threats
- Improperly secured wireless LANs can be accessed from outside the organization
- Infected laptops or devices can be used internally
Bastion Hosts
- A bastion host is a secure system that serves as a platform for application-level or circuit-level gateways
- Characteristics of bastion hosts include:
- Runs a secure operating system with only essential services
- Requires user authentication to access the proxy or host
- Proxies can restrict features and hosts accessed
- Each proxy is small, simple, and checked for security
- Each proxy is independent and non-privileged
- Limited disk use, with read-only code
Zero-Day Attacks
- A zero-day attack is a computer attack that exploits software vulnerabilities
- Worms and viruses can spread rapidly across the world
- Zero-hour describes the moment when the exploit is discovered
IDS (Intrusion Detection System)
- IDS monitors traffic offline and generates an alert when malicious traffic is detected
- Advantages of IDS include:
- Works passively
- Requires traffic to be mirrored
- Does not slow network traffic
- Allows some malicious traffic into the network
Viruses, Worms, and Trojan Horses
- A virus is malicious software attached to another program to execute unwanted functions
- A worm executes arbitrary code and installs copies of itself in the infected computer's memory
- A Trojan horse is a malicious program disguised as a legitimate application
- Viruses, worms, and Trojan horses can be mitigated by:
- Installing antivirus software
- Keeping software up-to-date
- Avoiding suspicious emails and attachments
Buffer Overflows
- A buffer is an allocated area of memory used to store data temporarily
- A buffer overflow occurs when a process attempts to store data beyond the buffer's capacity
- Buffer overflows can result in data overwriting adjacent memory locations and causing unexpected behaviors
- Buffer overflows are a primary conduit for viruses, worms, and Trojan horses
Worm Mitigation
- Worm attack mitigation requires diligence from system and network administration staff
- A four-phase process is used to mitigate an active worm attack:
- Containment Phase: Limits the spread of the worm infection to already affected areas
- Inoculation Phase: Runs parallel to or subsequent to the containment phase
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Quiz about different cryptography algorithms, including 3DES, Diffie-Hellman Key Exchange, and Symmetric vs Asymmetric Key Algorithms.
