Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Winzip and encrypred data tables
Message
De
28/07/2003 10:57:17
 
 
À
28/07/2003 10:48:03
Dave Nantais
Light speed database solutions
Ontario, Canada
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00814117
Message ID:
00814121
Vues:
10
>A client uses cryptor to encrypt their data tables.
>When running Winzip to compress these files and place them on disks for backup very little decrease in file size occurs.
>Is this because the tables are encrypted?
>The pattern matching mathematical thingie (or algorithm) that drives the compression system can't find repitition or long consecutive strings of the same character?
>Or have I fubarred Winzip or ?
>
>TIA


Hi Dave, yes the process of encrypting the files makes them much less compressible. Same thing happens if you encrypt your project when you compile it.

If you are interested XiTech also make Compaxion which compress' files into a Compaxion volume file and then allows your app to seamlessly access the files simply by including their FLL library. Its very cool and has a certain level of encryption in the compression process. The only downside is that it is multiuser read but single user write. Wierd I know, but perhaps this has been changed in a newer version.

HTH
In the End, we will remember not the words of our enemies, but the silence of our friends - Martin Luther King, Jr.
Précédent
Répondre
Fil
Voir

Click here to load this message in the networking platform