NIST Paper declares modern cryptography obsolete

In one broad stroke, a NIST IR draft released in February of 2016 has declared much of the current cryptographic system that underpins modern communication obsolete.

There appears to be a problem with the paper though, it has no real foundation for the claims that quantum computing will obsolete essentially all of the existing crypto schemes out there. Another issue with the claim is the idea that AES-256 will require higher key. Apparently the authors do no understand what AES-256 really is.

Here is a link to the draft, and you are welcome to review it and comment.

http://csrc.nist.gov/publications/drafts/nistir-8105/nistir_8105_draft.pdf

Cryptographic Algorithm	Type	Purpose	Impact from large-scale quantum computer
AES-256	Symmetric key	Encryption	Larger key sizes needed
SHA-256, SHA-3		Hash functions	Larger output needed
RSA	Public key	Signatures, key establishment	No longer secure
ECDSA, ECDH (Elliptic Curve Cryptography)	Public key	Signatures, key exchange	No longer secure
DSA (Finite Field Cryptography)	Public key	Signatures, key exchange	No longer secure

Table 1 - Impact of Quantum Computing on Common Cryptographic Algorithms