Once the file is on your router, use the verify command to check the digital signature against the image header: verify flash:c1900-universalk9-mz.SPA.158-3.M7.bin .
: Open PowerShell and use the Get-FileHash cmdlet: Get-FileHash .\c1900-universalk9-mz.SPA.158-3.M7.bin -Algorithm SHA512 c1900universalk9mzspa1583m7bin download verified
Alternatively, for modern images, use the software authenticity command: Once the file is on your router, use