Tag Archives: Internet protocolsInternet protocols

IETF 86 – Web PKI Working Group

March 22, 2013 by Bruce Morton     No Comments

At the IETF 86 meeting in Orlando last week, there was a working group meeting discussing the operations of the Web PKI. At the previous IETF 85 meeting a birds-of-a-feather was held to discuss the purpose of having such a group.

Summarization of CRIME Attack on SSL

October 2, 2012 by Bruce Morton     No Comments

I’ve written a few blogs on CRIME, but now that Juliano Rizzo and Thai Duong have presented CRIME at Ekoparty 2012, I thought a summary is due. CRIME is short for “Compression Ratio Info-Leak Made Easy.” In their presentation, Rizzo and Duong reminded us that HTTPS provides confidentiality, integrity and authenticity; however, CRIME decrypts portions [Read More...]

Filed Under: Secure Browsing, SSL Tagged With: CRIME, DEFLATE, encryption

Testing Your SSL Server for CRIME

September 17, 2012 by Bruce Morton     No Comments

We still have to wait for later this week when Juliano Rizzo and Thai Duong will present their CRIME SSL/TLS attack at Ekoparty Security Conference. Regardless, we now know that the attack is based on the implementation of TLS compression or SPDY (pronounced “speedy”). CRIME uses the vulnerability that there is information leakage when data [Read More...]

Speculation on CRIME

September 12, 2012 by Bruce Morton     No Comments

The SSL industry is waiting for the Ekoparty Security Conference next week to find out more details on the CRIME SSL/TLS attack. Speculation by SSL/TLS experts? The attack is based on TLS compression. Thomas Pornin made this post on IT Security of his guesses on how compression could be used in an attack. This also [Read More...]

Short-Lived Certificates

August 21, 2012 by Bruce Morton     2 Comments

Certificate revocation is a current SSL industry issue. There are many causes to the problem. Some end-users do not have certificate-revocation checking turned on. Browsers support CRL or OCSP, but in some cases not both. The certification authorities (CA) may not provide reliable revocation responses. And what if there are no revocation responses from a [Read More...]

Understanding SSL

August 7, 2012 by Bruce Morton     No Comments

Just thought I would let you know about a podcast called Sophos Techknow – Understanding SSL. Hopefully there won’t be much new for the regular readers of this blog, but the information may be valuable for those new to the SSL industry. I did want to make note of a few things. The podcasters discuss [Read More...]