compression AND encryption

[Bill Vlahos]

Definitly compress first then encrypt for the reasons Jerry said.

Bill Vlahos

Sent from my iPhone

On Jan 21, 2010, at 8:47 PM, Jerry J <jhj at jhj.com> wrote:

> On Jan 21, 2010, at 8:29 PM, stephen barncard wrote:
>>
>> So
>> on encode - (reverse order on decode)
>>
>> 1 compression, then encryption  <--my guess
>> 2 encrypting, then compression
>> 3 no difference or downside??
>
> I agree with your guess. Most compression algorithms depend on  
> regularities in the data, and encryption hides them. Encrypt first  
> and you would hide the stuff of which compression takes advantage.
>
> Randomness is next to Godliness.
>
> Cheer,
> Jerry Jensen
>
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