When transmitting data in a stream using symmetric encryption, both sides must share the same secret key. In order to securely transmit the shared secret key, learn about using either Diffie-Hellman or asymmetric encryption.
- [Instructor] Asymmetric encryption is great…for email confidentiality using Pretty Good Privacy…or Gnu Privacy Guard.…But for large data requirements or data transfer,…we use symmetric encryption,…as it's fast, efficient, with low overhead.…Symmetric encryption uses a single shared key…to encrypt and decrypt data.…That's why most of the time…we use a hybrid cryptosystem…that uses both asymmetric and symmetric encryption.…
When using symmetric encryption…such as DES, DDDES, or AES to exchange data,…both sides must use the same shared key.…The question is,…how do both sides get the same shared key?…Scientists realized this early on…and developed a way to securely transmit…the same shared secret key.…We can ensure both parties have the same shared secret key…in one of two ways:…generate keys using Diffie-Hellman…and use asymmetric encryption to transport the shared key.…
Whitfield Diffie and Martin Hellman…were two of a few groups…that developed public key technology in the 1970s,…as the need for securely exchanging…
- Security principles and terms
- SIEM technology
- Common security threats
- Social engineering
- Data loss prevention
- Cryptographic concepts
- Symmetric and asymmetric encryption
- Hash algorithms
- Network topologies, CAN, WAN, and SOHO
- Securing a virtual environment
Skill Level Intermediate
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1. Security Principles
2. Common Security Threats
4. Describe Network Topologies
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