Fundamentals of InfoSecadvanced
Compare link encryption and end-to-end encryption in terms of where protection is applied and what intermediate systems may see.
Answer
Link encryption protects data on individual communication links, so protection may be removed and reapplied at intermediate systems. End-to-end encryption protects data between the communicating endpoints, which can limit what intermediate systems can read. The approaches differ in where encryption and decryption occur and what information remains visible along the route.
Explanation
### The concept
Encryption deployment determines which parts of a communication path are protected. Link encryption applies protection across a particular link; an intermediate device may handle data after one protected link ends and before another begins. End-to-end encryption protects information between the communicating endpoints, so intermediate systems generally have less access to the protected content. The material emphasizes this difference in protection placement and intermediate visibility.
### What a good answer covers
- Link encryption operates on individual links.
- Intermediate systems may handle data between links.
- End-to-end encryption protects between communication endpoints.
- The location of encryption affects what intermediaries can see.
### Remember
Ask where encryption begins and ends to distinguish the deployment methods.
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