For the past few years, the Common Criteria program has been mandating entropy analysis for almost all protection profile based evaluations. Since November 2020, NIST 800-90B has also become a mandatory requirement under the FIPS 140-2 and the forthcoming FIPS 140-3 program, meaning there is evaluation of entropy sources in both major North American security standards. Over the past few years, NIST has been fine-tuning an entropy analysis process to help quantify entropy sources as per the 800-90B standard. Their work can be found on the NIST public github page. In addition, new development on a web-based submission process has begun called the “Entropy Source Validation” program (ESV). This process will accept data from a registered entity and process the entropy source data via the NIST 800-90B entropy analysis tool.
This article focuses on an important, but sometimes overlooked, aspect of the entropy source validation process: ensuring the data is in a format appropriate to be read by the entropy assessment tool.Read More