[Cryptography] how to encrypt for the very long term?

[Tifkap]

On Tue, Jul 31, 2018 at 03:15:50PM +0100, Dave Howe wrote:
> 
> On 31/07/2018 05:06, Christoph Gruber wrote:
> > Hi Philip!
> >
> > Perfect encryption is correct, also that perfect encryption is NOT
> > enough for security. For integrity purposes, other means my also
> > apply, or use cryptographic methods to detect alteration, but that is
> > not encryption, or only partially.
> > You can put all these together in one application, but the functions
> > and the methods you use, be separate.
> Or apply another layer - apply an archiving solution that has integrity
> and error recovery built in (so something like WinRAR) and then XOR that
> with a key.?? means you no longer have that theoretically perfect
> encryption, but in practical terms it is an improvement :)

Parchive (PAR3) uses Reed-Solomon error correction