Penetration Testing mailing list archives
RE: Opening PKI encrypted with Public Key outside your Escrow Authority.
From: "Adrian Floarea" <adrian.floarea () uti ro>
Date: Mon, 6 Mar 2006 21:37:11 +0200
Hi Sean, I'm not sure if I understand very well your case (), but I have some remarks. If I understand well the hypothesis are: 1. Acme company has a PK infrastructure with escrowed private key 2. User Beta has a PK infrastructure In this circumstances, the answer for your question is simple: No, you cannot decrypt the message. After you encrypt the message, only a person which has a private key (in this case User Beta) can decrypt the message. You, theoretically, don't have access to this key so you cannot decrypt the message. Regards, Adrian Floarea, CISA Information Security Department IT&C Division, UTI Systems SA Bucharest, Romania Email: adrian.floarea () uti ro -----Original Message----- From: Benson, Sean M [mailto:BensonS () state gov] Sent: Monday, March 06, 2006 7:59 PM To: pen-test () securityfocus com Subject: Opening PKI encrypted with Public Key outside your Escrow Authority. I have a Question maybe someone can explain to me. Say company Acme has a PKI structure. Company/User Beta also has PKI or is using PKI software It allows S/MIME and Proprietary Keys to be imported into and AcmeUser's keyrings/address books. If User () Acme com uses the key from AnotherUser () Acme com I as the Key Escrow CA can open/un-encrypt/read the mail using the Escrowed Private keys. But If User () Acme com uses the Public Key from User () Beta com to encrypt. Can I open this message using only the Keys I have Escrowed? Ie.. Only AcmeUser's Public/private pair? Or is it encrypted with the Public key of UserBeta and I am SOL? It's a discussion and I think I'm right but I'm having a hard time trackling down facts online about this. Which makes me think either it's so easy to open it that's it's just a given. or It's impossible and so blatant that it's a given. or I'm an ass who skipped some whitepapers I should have read. btw: I believe your SOL without that other key as it's encrypted with it. Am I right? Sbenson DRM: "In other words, embarrass and shackle the progress of improvements of tomorrow by recording and registering as law the prejudices and errors of today". - Isambard Kingdom Brunel ---------------------------------------------------------------------------- -- This List Sponsored by: Lancope "Discover the Security Benefits of Cisco NetFlow" Learn how Cisco NetFlow enables cost-effective security across distributed enterprise networks. StealthWatch, the veteran Network Behavior Analysis (NBA) and Response solution, leverages Cisco NetFlow to provide scalable, internal network security. Download FREE Whitepaper "Role of Network Behavior Analysis (NBA) and Response Systems in the Enterprise." http://www.lancope.com/resource/ ---------------------------------------------------------------------------- -- ------------------------------------------------------------------------------ This List Sponsored by: Cenzic Concerned about Web Application Security? As attacks through web applications continue to rise, you need to proactively protect your applications from hackers. Cenzic has the most comprehensive solutions to meet your application security penetration testing and vulnerability management needs. You have an option to go with a managed service (Cenzic ClickToSecure) or an enterprise software (Cenzic Hailstorm). Download FREE whitepaper on how a managed service can help you: http://www.cenzic.com/news_events/wpappsec.php And, now for a limited time we can do a FREE audit for you to confirm your results from other product. Contact us at request () cenzic com ------------------------------------------------------------------------------
Current thread:
- Opening PKI encrypted with Public Key outside your Escrow Authority. Benson, Sean M (Mar 06)
- Re: Opening PKI encrypted with Public Key outside your Escrow Authority. Enno Rey (Mar 07)
- RE: Opening PKI encrypted with Public Key outside your Escrow Authority. Adrian Floarea (Mar 07)
- Re: Opening PKI encrypted with Public Key outside your Escrow Authority. derez (Mar 07)
- <Possible follow-ups>
- RE: Opening PKI encrypted with Public Key outside your Escrow Authority. Benson, Sean M (Mar 07)