One of the hardest aspects of encryption is keeping up with the capabilities of other systems to decrypt information. We've gone from 3DES to AES 128 to AES 256 and beyond. And yet grid computing and the advances in quantum cryptography make it increasingly difficult to develop solutions that still take years to decrypt.
We also seem to focus on the algorithms in public key infrastructures rather than the techniques used to encrypt. We still use passwords to create a token. Those passwords and tokens can then be brute forced using multiple machines faster than...
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