inverse of hash function

[Matt_W1]

You need to define what you think the original message is supposed to be. The transmit function looks horribly wrong to me so I'm not sure what the orignal message is supposed to look like (anyway it's certainly not secure beyond obfuscation). I strongly supect that transmit needs to be rewritten, you could try to get the blowfish algorithm to work for instance. There's also mention of cryptog but the sight for that is a few years old.

You could also try explaining what transmit is supposed to do.

[desham]

i am trying to filter to the noise

how to connect string and simulated filter, they r two different data types

[Matt_W1]

As written you cannot turn "concatenated string" back into "original", since a huge amount of information is lost.

Why does the wave need to be encrypted, are you sending it over a network?

If you just want to filter you should be able to find something in the labview examples.

[desham]

I am trying to filter and look how would be my original signal

Filter is not working, I am getting an error 

Is there any way to filter from the string

[Been bitten by LabVIEW]

Sorry, meant dictionary, not hash.  Doh!

A

[BTreece]

There is not a way to directly filter from the string.  I would suggest that you filter before you do all of your encrypting.

Brandon Treece

Applications Engineer

National Instruments

[desham]

I kept the filter before A/D waveform its working fine

if u take the sinewave (without noise and filter) u r getting a constant output

if u take the sinewave, white noise and filter .    I am not getting a constant ouput, I know this is because of white noise

i dont know the reason behind it.

[BTreece]

When you say you are not getting a constant output, do you mean that you are not getting a perfect sine wave out?  If you are it is because there are many frequency elements in noise.  When you set up your filter you are setting up a band of frequencies that you want to reject.  If you know the exact frequency that your sine wave will be, then you can get closer to your original signal.  If your filter is not tight around your wanted frequency some unwanted frequencies can get through the filter.

Brandon Treece

Applications Engineer

National Instruments

[desham]

If iam not getting a constant output the sample signal is invalid or valid

[desham]

If iam not getting a constant output the sample signal is invalid or valid

how to determine if the samples are valid or not ?