> ​And I will, as seems to be *my* role here, ​recommend checking out 
> keybase.io, which you can use without trusting, and provides what smells to 
> me like extremely practical probabilistic key<=>person mapping confidence.

Keybase is about as good as you can get with a centralized system.

However, it creates an system that ends up being not very user friendly 
(especially when it comes to replacing lost or stolen keys). It's also a 
central point of failure.

And, for whatever reason, they replace personal everyone's email with their own 
@keybase.io email address, so your emails all go through their servers. As a 
centralized platform, I won't be surprised to see more of these walled-garden 
lock-in type things.

For secure communications systems, I prefer systems that no entity has a 
monopoly over, without central authorities or points of failure. They're more 
robust and less prone to tampering. The 51% attack is the worse that can happen 
with the blockchain, and it amounts only to censorship. The worst that can 
happen with a central authority, on the other hand, is total compromise.

Cheers,
Greg (i'm greg in the namecoin blockchain, but I prefer, eventually, to be 
[email protected] when that's figured out).

--
Please do not email me anything that you are not comfortable also sharing with 
the NSA.

On Nov 18, 2014, at 11:42 AM, Tim Bray <[email protected]> wrote:

> On Tue, Nov 18, 2014 at 11:27 AM, Tao Effect <[email protected]> wrote:
>> Cracking the usable key verification problem. This move brings WhatsApp to 
>> the same level of security as iMessage (or better, given the forward 
>> security), but WhatsApp/Facebook could still do a switcheroo on people's 
>> keys. TextSecure never really figured this out IMO - it still expects people 
>> to manually compare long strings of hex.
> 
> 
> I will, a​​s seems to be my role here, recommend the blockchain and a system 
> like DNSChain for solving this problem. :-)
> 
> ​And I will, as seems to be *my* role here, ​recommend checking out 
> keybase.io, which you can use without trusting, and provides what smells to 
> me like extremely practical probabilistic key<=>person mapping confidence.
> 
> - Tim Bray (If you’d like to send me a private message, see 
> https://keybase.io/timbray)

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