Deniable data storage

[James A. Donald]

    --
 I want fully deniable information storage -- information 
 theoretic deniable, not merely steganographic deniable, for 
 stenography can never be wholly secure.

So I would have a fixed sized block of data containing a 
variable number of smaller secret chunks of data.  A random key 
would extract a random length of gibberish, a valid key would 
extract a stream of valid data, and revealing one secret key to 
the adversary would not give the adversary any evidene that 
more secrety keys were present or absent.

Any good known algorithms for this? 

    --digsig
         James A. Donald
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