Re: [quicwg/base-drafts] Reference "Nonces are Noticed" in the header protection analysis section (#3031)

Martin Thomson <notifications@github.com> Mon, 16 September 2019 05:50 UTC

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Subject: Re: [quicwg/base-drafts] Reference "Nonces are Noticed" in the header protection analysis section (#3031)
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martinthomson commented on this pull request.



>  
 ~~~
 protected_field = field XOR PRF(hp_key, sample)
 ~~~
 
-This construction is secure against chosen plaintext attacks (IND-CPA) {{IMC}}.
+Assuming hp_key is distinct from the packet protection key, this construction
+(HN1) achieves AE2 security and therefore guarantees privacy of `field`, the

> We  give  a  modified  syntax  for  nonce-based encryption, called NBE2, in which decryption does not get the nonce, a corresponding framework of security definitions called AE2 that guarantee nonce privacy in addition to authenticity and message privacy, and simple ways to turn NBE1 AE1-secure schemes into NBE2 AE2-secure schemes.

This is in the introduction of the paper, under "Contributions in brief."

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