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Encryption Strength

 
 
James
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      02-10-2005
Would the encryption of winzip (full strength) be as strong and secure as
the secure link you establish between your browser and a secure server. Eg.
when the little padlock pops up to indicate your on a secure server?


 
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John Wunderlich
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      02-10-2005
"James" <(E-Mail Removed)> wrote in
news:420abfd2$(E-Mail Removed):

> Would the encryption of winzip (full strength) be as strong and
> secure as the secure link you establish between your browser and a
> secure server. Eg. when the little padlock pops up to indicate
> your on a secure server?


WinZip ver 9.0 uses 128-bit and 256-Bit AES encryption (about as
industrial-strength as you can get). Browser uses 128-bit encryption.
If you believe neither program has back-doors, then WinZip is probably
more secure.

HTH,
John

 
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why?
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      02-10-2005

On Thu, 10 Feb 2005 01:58:43 -0000, James wrote:

>Would the encryption of winzip (full strength) be as strong and secure as
>the secure link you establish between your browser and a secure server. Eg.
>when the little padlock pops up to indicate your on a secure server?


Depends on the number of bits and method used.

Winzip
128- and 256-bit key AES encryption
is better than 40/56bit https , similar to 128 bit https some https may
be 256 bits as well..

They are also 2 different things, with different sorts of risks.

You could start with
http://www.winzip.com/whatsnew90.htm
and
http://searchsecurity.techtarget.com...214006,00.html
not forgetting Google.


Me
 
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John Wunderlich
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      02-12-2005
"James" <(E-Mail Removed)> wrote in
news:420abfd2$(E-Mail Removed):

> Would the encryption of winzip (full strength) be as strong and
> secure as the secure link you establish between your browser and a
> secure server. Eg. when the little padlock pops up to indicate
> your on a secure server?
>


In addition to the number of bits of key that the algorithm has, you
must also consider the password you choose. If you pick a 26 character
password made up of the lower case letters plus a space character, you
have limited yourself to an equivalent 124 bits of password entropy so
a 256-bit key algorithm won't buy you anything beyond the 128 bit key.
If your password is English-looking (every 4th or 5th character a vowel
and there are more t's n's and s's than j's, v's and q's then your
effective space is even worse. In this case, a computer picking a
close-to-random 128-bit key will be more secure than your password in
combination with a higher-bit key algorithm.

HTH,
John
 
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