: When prompted, type eulen exactly as it appears.

: Upload the extracted file to VirusTotal to check it against dozens of antivirus engines.

: Avoid simple words like "eulen." Use a mix of symbols, numbers, and cases.

: Always check "Encrypt file names" so that unauthorized users cannot even see what files are inside the archive.

: Advanced users can use command-line RAR to automate the creation of encrypted backups.