Unable to decrypt file copied from USB thumb drive.
chris at christaylordeveloper.co.uk
Fri Oct 29 10:17:16 CEST 2021
I am developing a backup process for personal files, on USB thumb
drive. I tar and zip my files (30GB) then encrypt them with:
gpg --no-symkey-cache --symmetric --cipher-algo AES256 my-backup.tar.gz
I copy my-backup.tar.gz.gpg to my USB thumb drive. I am using Ubuntu so
the USB drive is formatted to Ext4.
I try to decrypt with:
gpg --output my-backup.tar.gz --decrypt my-backup.tar.gz.gpg
and get the following error:
gpg: AES256 encrypted data
gpg: encrypted with 1 passphrase
gpg: block_filter 0x0000556d112aa1e0: read error (size=13328,a->size=13328)
gpg: WARNING: encrypted message has been manipulated!
gpg: block_filter: pending bytes!
I have gpg version 2.2.19, libgcrypt 1.8.5. Without encryption this
process has worked perfectly well many times.
Any advice greatly appreciated.
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