Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Encrypt user name and email or not?
Message
De
15/09/2010 10:02:19
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01481002
Message ID:
01481261
Vues:
31
>>>
>>>Can you see, by looking at an entry in a column, if the entry is encrypted with some cipher code or hash?
>>
>>
>>I was just pulling your leg - but to answer the question
>>
>>(1) a hash is always the same length (eg md5 hash = 16 bytes or 32 hex chars)
>>(2) encryption without block cyphering (eg rc4) : the lengths will vary
>>(3) If you use block ciphering, the lengths will vary depending on the length of the password, but all lengths will be a multiple of the block
>>
>>So, looking at the lengths of the encrypted passwords
>>
>>- if the length is constant, it's likely to be a hash
>>- if the lengths are a multiple of something (not 1) it's likely to be a block cipher
>>- otherwise it's encrypted, but not with a block cipher
>>
>>I case of passwords - since the lengths are small - it's difficult to distinguish between hash and block cipher
>>
>>
>>see http://en.wikipedia.org/wiki/Block_cipher
>>http://en.wikipedia.org/wiki/Cryptographic_hash_function
>>
>>Post your encrypted passwords and let me guess
>
>Thank you for the explanation. You must be doing work with either banks or Interpol since you know so much about encryptions <g>


I have written an AES128 encyyption in C#. You know a couple of things once you have finished that
Gregory
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform