ChaCha20-Poly1305 is an authenticated-encryption option. Evaluate device performance, platform support and protocol requirements together.
Evaluation approach
Use mature high-level APIs instead of constructing your own encryption combination. Preserve key and nonce rules.
Application example
During an algorithm migration, define how old records are read and new records identified.
Limits and considerations
A popular algorithm cannot be substituted arbitrarily into every protocol.
Migrating older data
Changing the write path is insufficient. Provide controlled reading, verification and migration for old records. Do not silently try alternative algorithms on incorrectly labeled data.
Checks and decisions
- Version the format
- Test compatibility
- Prevent nonce reuse
Sources
The primary references above provide the technical basis. Example workflows and evaluation suggestions are this publication’s explanations, not independent test results for a particular product.