Flutterby™! : RSA backdoors & Canon printers

Next unread comment / Catchup all unread comments User Account Info | Logout | XML/Pilot/etc versions | Long version (with comments) | Weblog archives | Site Map | | Browse Topics

RSA backdoors & Canon printers

2017-12-18 23:08:42.684898+00 by Dan Lyke 3 comments

Oh this is beautiful: RT Matthew Green‏ @matthew_d_green:

There is no way the extended_random extension and TLS1.3’s keyshare just happened to share the same value. I smell an excellent prank.

Apparently RSA implemented a crypto backdoor in their BSAFE TLS library. Security researcheers who reverse-engineered the free version of this library saw the backdoor, but believed it was turned off. Apparently it was turned on in the commercial version used in Canon printers. This flag conflicted with a new TLS keyshare feature.

Wonder if someone did this in order to surreptitiously expose that the flag was getting turned on in the commercial version of the library.

[ related topics: Language Interactive Drama Books Invention and Design Cryptography Woodworking ]

comments in ascending chronological order (reverse):

#Comment Re: RSA backdoors & Canon printers made: 2017-12-24 00:12:30.997836+00 by: Dan Lyke

The Strange Story of Extended Random, some further exploration.

#Comment Re: RSA backdoors & Canon printers made: 2017-12-24 16:19:23.157515+00 by: TheSHAD0W

> (If these turn out to be special Department of Defense printers, I will eat my words.)

I wouldn't be surprised though. One branch of government spying on another? I believe it.

#Comment Re: RSA backdoors & Canon printers made: 2017-12-26 17:03:56.299723+00 by: Dan Lyke

Yep, I could totally believe that there's various inter-departmental skullduggery afoot...

Add your own comment:

(If anyone ever actually uses Webmention/indie-action to post here, please email me)




Format with:

(You should probably use "Text" mode: URLs will be mostly recognized and linked, _underscore quoted_ text is looked up in a glossary, _underscore quoted_ (http://xyz.pdq) becomes a link, without the link in the parenthesis it becomes a <cite> tag. All <cite>ed text will point to the Flutterby knowledge base. Two enters (ie: a blank line) gets you a new paragraph, special treatment for paragraphs that are manually indented or start with "#" (as in "#include" or "#!/usr/bin/perl"), "/* " or ">" (as in a quoted message) or look like lists, or within a paragraph you can use a number of HTML tags:

p, img, br, hr, a, sub, sup, tt, i, b, h1, h2, h3, h4, h5, h6, cite, em, strong, code, samp, kbd, pre, blockquote, address, ol, dl, ul, dt, dd, li, dir, menu, table, tr, td, th

Comment policy

We will not edit your comments. However, we may delete your comments, or cause them to be hidden behind another link, if we feel they detract from the conversation. Commercial plugs are fine, if they are relevant to the conversation, and if you don't try to pretend to be a consumer. Annoying endorsements will be deleted if you're lucky, if you're not a whole bunch of people smarter and more articulate than you will ridicule you, and we will leave such ridicule in place.


Flutterby™ is a trademark claimed by

Dan Lyke
for the web publications at www.flutterby.com and www.flutterby.net.