Re: [TLS] TLS 1.2 draft comments

[EKR <ekr@xxxxxxxxxxxxxxxxxxxx>]

"Omirjan Batyrbaev" <batyr@xxxxxxxxxxxx> writes:

> see inserted:
> Subject: Re: [TLS] TLS 1.2 draft comments
>
>
>> "Omirjan Batyrbaev" <batyr@xxxxxxxxxxxx> writes:
>>
>> >> 2. CIPHERSPEC, EXPORT
>> >>
>> >> If the 40-bit export ciphersuites are being deprecated,
>> >
>> > But some constrained enviroments do need 40-bit "export" ciphersuites.
>>
>> I'm not aware of any such environment. Can you please > name them?
>
> Some embeded systems, for example cheap EPC RFID tag. The Generation 2 tag
> today does not even have a cryptographic hash function, etc.

The TLS 40-bit ciphersuites don't provide any advantage here.  They're
just the ordinary ciphers (RC4 and DES) with pre-processing to reduce
the key to 40 bits of entropy. They're no faster and no smaller (gate
count, memory footprint) than the ciphers they are derived from.

-Ekr

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