Cryptography depends upon trust to ensure the authenticity of communications. In this video, Mike Chapple explains three common trust models: in-person key exchange, the web of trust, and the public key infrastructure, PKI.
- [Instructor] Any cryptographic system … depends upon some degree of trust. … Earlier in the course, we discussed how strong cryptography … depends upon a secure key exchange process. … The two people communicating must be confident … that they're really communicating with each other … and not an impersonator and that nobody is able to eavesdrop … on the communication where they exchange encryption keys. … The Diffie-Hellman key exchange protocol helps us … with preventing eavesdropping, but we still require some way … to ensure that we're not communicating with an imposter. … In asymmetric cryptography, … every user possesses a personal secret key … that they don't need to share with anyone else. … They can also share their public keys freely, … so there's no risk of eavesdropping there. … These two factors combine to eliminate the need … for eavesdropping protection during key exchange. … However, we do still need to worry about imposters. … How do we know that the person sending us their public key …
- Block storage types
- Cloud storage security threats
- Encryption basics
- Choosing encryption algorithms
- Key management
- Public key infrastructure (PKI)
- Creating and revoking digital signatures
- Securing common protocols
- Data protection
- Information management
- Information rights management
- Logging security events
- Continuous security monitoring
Skill Level Intermediate
CompTIA Cloud+ (CV0-002) Cert Prep: 2 Securitywith Joseph Holbrook1h 31m Intermediate
1. Cloud Data Storage
3. Key Management
4. Public Key Infrastructure
5. Cryptographic Applications
6. Data Protection
7. Information Management
8. Data Event Auditability
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