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Posts Tagged ‘SNI’

What is really protected by SSL and TLS?

Saturday, April 8th, 2017

This question came in via Ask Erik:

Hi Erik,

I stumbled upon your blog while trying to learn a little about SSL/TLS in the context of client/server e-mail sessions, i.e. not web mail which I understand to be an HTTP session.  I am just an ordinary user with no special security needs but I find all this news about corporate and government surveillance to be troubling for both philosophical and practical reasons.  In any case my questions is quite simple.

My e-mail client, apple mail, and my e-mail service provider both support SSL so my e-mail exchanges between my computer and the server are encrypted.  I understand that I can’t control what happens with other e-mail servers.  What I am trying to understand is what does it mean to be encrypted?  When an e-mail leaves my computer how much of the message is encrypted?   Are the e-mail headers encrypted including the sender and recipient e-mail addresses.  I would assume so but nobody talks about the details.  What metadata trail does a user leave when using SSL/TLS.  Is it is as simple as the destination and sending IP address with everything else encrypted?  Reading Data and Goliath right now by Bruce Schneider which talks about a lot of this stuff but again doesn’t give quite enough detail.  At the end of the day I am trying to understand how much protection SSL really provides.

SSL (now TLS) protects data as it travels across the Internet. To understand in detail how SSL works, we recommend reading: How does Secure Socket Layer (SSL andTLS) work?  However, looking at how the protocol works can leave answers to some of these fundamental questions a little unclear.  Lets address them one by one.

SSL and TLS Security

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End of Life for LuxSci Internet Explorer 8 on XP Support

Sunday, August 2nd, 2015

As of November 1st, 2015, LuxSci will no longer support Internet Explorer versions 8 and below on Windows XP.  We will still support Internet Explorer v8 on Windows Vista and above (for a while).

What will be the effect of the dropped support?  Sometime after November 1st, 2015, users of Internet Explorer 8 on XP may no longer be able to connect to LuxSci.com or any web sites hosted by LuxSci, due to its lack of support for modern Internet security and usage features.

For customers who still use Internet Explorer 8 on XP, we recommend installing the latest version of FireFox or Google Chrome, as these will work fine even on very old operating systems, such as Windows XP, and will provide support for features we are enabling, which Internet Explorer 8 on XP does not support.

What is actually changing?

LuxSci will be making 2 changes after November 1st:

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