Re: OpenSSH and CBC

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

 



On 16.06.2015 14:43, Aris Adamantiadis wrote:
Hi Gerhard,

This is not exactly true. CTR modes have the length field encrypted. etm MAC modes and AES-GCM have the length field in cleartext.
CBC is dangerous because the length field is encrypted with CBC.


What's exactly the topic encrypting the length field with CBC?
Any documentation/papers on this to understand (except the source)?

aes128-ctr + hmac-sha256 doesn't have any known vulnerability and encrypts the packet length, but uses the bad practice of e&m. chacha20-poly1305 encrypts both payload and packet len + uses authenticated encryption (best practice), even if the implementation looks very similar to etm.


Why is E&M bad practice?

Thank you.

Ciao,
Gerhard
_______________________________________________
openssh-unix-dev mailing list
openssh-unix-dev@xxxxxxxxxxx
https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev



[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux