* Posts by Sergey

1 publicly visible post • joined 8 Feb 2008

Carbonite sprinkles some fancy over online backup service

Sergey

@Simon

The per-block encryption you describe would only work if the blocks stay aligned. If you prepend one byte to a file, no block hashes will match, the more efficient approach is to use rolling checksums. I know all this because I'm one of the independent competitors to these mentioned products (my app is S3 Backup) and currently implementing the block-level differential scheme as well.