Fighting Daubert and Frye challenges is an important aspect of being an expert witness. It may be an infrequent event, but here are some ideas for expert witnesses to help get ready and win Daubert challenges: Expert witnesses should thoroughly review the criteria in the Daubert decision, which includes testing and peer review, error rates, general acceptance in the scientific community, and other relevant factors.  Error rates are somewhat novel in digital forensics and bear special attention.  Please see “Standard Guide for Establishing Confidence in Digital and Multimedia Evidence Forensic Results by Error Mitigation Analysis” authored by the National Institute of Standards and Technology and available here: https://www.nist.gov/system/files/documents/2022/01/31/ASTM-E3016-18%20Error%20Mitagation.pdf   Expert witnesses should keep detailed lab notes and other records of their work and methodologies used, including any testing, peer review, or other factors that support their conclusions.   Expert witnesses should stay up-to-date on digital forensics research and literature which can help demonstrate the reliability and validity of their methods and protocols.  Read key blogs and attend webinars and conferences.   Expert witnesses should work closely with the legal team to identify potential Daubert challenges and develop strategies to address them.   Expert witnesses should be prepared to defend their methods and conclusions, including any testing or peer review they have conducted to support their work.   Expert witnesses should be transparent and honest about their work, including any potential limitations or weaknesses in their methods or conclusions. By reviewing the foregoing ideas, expert witnesses can better prepare for and fight Daubert challenges, and increase their chances of successfully qualifying to testify in the courtroom.