Encryption is provided with additional diffusion components to construct a block cipher with a large and variable block size. The cipher incorporates an encryption system or algorithm such that the cipher is at least as secure as the encryption system or algorithm. Additional components of the cipher provide improved diffusion. This combination ensures that the cipher is at least as strong as the encryption algorithm, and at the same time it provides additional security properties due to its improved diffusion.

 
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> Establishing a collaborative domain among communication terminals responsive to authentication

> Method and system for use of shared data to gain wireless packet data connectivity

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