Hash functions are mathematical algorithms that transform a variable length input into a unique fixed length output. In this video, Mike Chapple explains the role of hash functions in cryptography.
- [Instructor] Hash functions are extremely important … to the use of public key cryptography … and in particular to the creation of digital signatures … and digital certificates. … Let's start with a technical definition of a hash function, … and then we'll explain it piece by piece. … A hash function is a one-way function … that transforms a variable-length input … into a unique, fixed-length output. … And let's pick apart that definition. … Hash functions are one-way functions. … That means that you can't reverse the process of hashing. … If you have content, you can use a hash function … to calculate the hash value of that content, … but you can't go the other way around. … If you have a hash value, … you can't use it to figure out the original text, … unless you already have a copy of that text. … Hash functions map variable-length input … to fixed-length outputs. … That means that you can send input of any length … into a hash function, and the hashes that it produces … will always be the same length. …
Note: This course is designed to cover the most recent version of the CCSP exam, released in August 2019.
- 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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