if our encrypted file or data is corrupted, maybe due to upload download process in cloud storage, can it be decrypted ?
how to protect / prevent corrupted encrypted file or data ?
how to recover corrupted encrypted file or data ?
if our encrypted file or data is corrupted, maybe due to upload download process in cloud storage, can it be decrypted ?
how to protect / prevent corrupted encrypted file or data ?
how to recover corrupted encrypted file or data ?
Hi Jaka,
trying to answer your questions:
The underlying encryption would allow in theory allow it in some situations
to try to decrypt a file where parts are missing (or are corrupt) however there is
no easy way to do this offered by GnuPG (the crypto engine within Gpg4win)
for good reasons.
Encryption with OpenPGP (since many years) uses a “modification detection code” (MDC),
which is like a checksum, so it can be seen that a file’s integrity is intact. For S/MIME
it is better to sign the file. (Overall the rule of thumb is: sign the file,
as a signature is a very strong “checksum”.)
Usually there is not way to recover corrupted data, so best is to request it again
from the communication partner or use a backup.
Regards,
Bernhard
thank you