Category Archives: VoIP Security

Blue Box ETel2006 Podcast #1: Phil Zimmermann presentation

Synopsis: Presentation by Phil Zimmerman at O’Reilly’s Emerging Telephony Conference on January 26, 2006


Welcome a special edition of Blue Box: The VoIP Security Podcast from the floor of the Emerging Telephony Conference in San Francisco, CA.  In this presentation, Phil Zimmermann, creator of PGP, outlines his ideas and plans for a new way to encrypt VoIP conversations.  His new software, currently called "zFone", will be available in early March for beta testing.  Updates and information will be available from his website at http://www.philzimmermann.com/.  A quote:

I would like to do for VoIP what I did for e-mail… I’d like to make it possible for you to whisper in someone’s ear – even if their ear is thousands of miles away.

We thank Phil Zimmermann and the great team at O’Reilly for giving us permission to make this recording available to you all.

Download the show here (MP3, 22MB) or subscribe to the RSS feed to download the show automatically.  The show runs about 23 minutes.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.
Audio comments sent as attached MP3 files are definitely welcome and
will be played in future shows.  You may also call the listener comment
line at +1-206-338-6654 to leave a comment there.

Blue Box Podcast #13 – Jan 19, 2006 – Interview with Shawn Merdinger on WiFi security

Synopsis: Interview with Shawn Merdinger about WiFi phone vulnerabilities, VoIP security, comments, news, VOIPSEC review


Welcome to Blue Box: The VoIP Security Podcast show #13, a 35-minute podcast  from Dan York and Jonathan Zar around news and commentary in the world of VoIP security. This show primarily features an 29-minute interview with Shawn Merdinger, an independent security researcher focused on the security of WiFi SIP handsets.

Download the show here (MP3, 33MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Download the show here (MP3, 33MB) or subscribe to the RSS feed to download the show automatically.

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #12 – January 17, 2006

Synopsis: VoIP security news, WiFi phone vulnerabilities, comments, news, VOIPSEC review


Welcome to Blue Box: The VoIP Security Podcast show #12, a 55-minute podcast  from Dan York and Jonathan Zar around news and commentary in the world of VoIP security. This show also features an 15-minute interview with Bogdan Materna, CTO and co-founder of VoIPShield Systems

Download the show here (MP3, 50MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Download the show here (MP3, 50MB) or subscribe to the RSS feed to download the show automatically.

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #11 – January 9, 2006

Synopsis: VoIP security news, WiFi phone vulnerabilities, comments, news, VOIPSEC review


Welcome to Blue Box: The VoIP Security Podcast show #11, a 39-minute podcast  from Dan York and Jonathan Zar around news and commentary in the world of VoIP security. This show also features an 18-minute interview with Steve Mank, COO of Qovia.

Download the show here (MP3, 39MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Note: Audio quality was a bit lower than previous shows and there was some echo.  We know – and more importantly we know how to fix it.  Future shows will be bettter.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Download the show here (MP3, 38MB) or subscribe to the RSS feed to download the show automatically.

Thank you for listening and please do let us know what you think of the show.

Call for Papers: Third Annual VoIP Security Workshop, Berlin, Germany, June 2006

Dorgham Sisalem recently posted to the VOIPSEC mailing list this Call for Papers for the Third Annual VoIP Security Workshop on June 1 and 2 in Berlin, Germany. As the page says:

While the standards and products for VoIP services have reached market maturity, security and regulatory aspects of such services are still being discussed. The aim of the VoIP Security Workshop is to serve as a platform for researchers and visionaries from academia, research labs, industry and government from all over the globe to share their ideas, views, results, and experiences in the field of VoIP and IMS security and regulation. The Third VoIP Security Workshop will include presentations of theoretical and experimental achievements, innovative security systems, prototyping efforts, case studies, and advancements in technology directly affecting VoIP and IMS services.

Submission deadline is February 28th. It sounds like an interesting workshop… I may have to very well see if I can get there. (Added bonus for me… Berlin is a great city and I get to practice mein Deutsch!)

Blue Box Podcast #10 – January 3, 2006

Synopsis: VoIP security news, WiFi phone vulnerabilities, comments, news, VOIPSEC review


Welcome to Blue Box: The VoIP Security Podcast show #10, a 41-minute podcast  from Dan York and Jonathan Zar around news and commentary in the world of VoIP security.

Download the show here (MP3, 39MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Download the show here (MP3, 39MB) or subscribe to the RSS feed to download the show automatically.

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #9 – December 21, 2005

Synopsis: VoIP security news, year in review, VOIPSEC review


Welcome to Blue Box: The VoIP Security Podcast show #9, a 29-minute podcast (with 4 bonus minutes… read on) from Dan York and Jonathan Zar around news and commentary in the world of VoIP security.

Download the show here (MP3, 32MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Show Content:

Also, as a holiday bonus – and because podcasts all over the Internet are participating in this effort, after the regular show outro around 29 minutes, the show includes the UNICEF-benefit song "If Every Day Were Christmas" created by Podsafe for Peace, a collaboration of 32 artists in 9 countries very much along the lines of the "We Are The World" effort back in 1985 – only this time the artists did not physically meet and it was all put together digitally.  If you have not heard it yet, it is well worth a listen.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

NO PODCAST NEXT WEEK!  We are taking a break for the holidays but will be back with a new show on the week of January 2nd.  Have a great holiday season… and we will catch up with you in the new year…

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #8 – December 12, 2005

Synopsis: VoIP security news, interview with Mark Collier, CTO of SecureLogix


Welcome to Blue Box: The VoIP Security Podcast show #8, a 47-minute podcast (with 6 bonus minutes… read on) from Dan York around news and commentary in the world of VoIP security.

Download the show here (MP3, 48MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Though we tried very hard to connect (including planning to do the show with Jonathan calling in from an airport), Jonathan was travelling again this week and so Dan was solo again. This show does feature a 19-minute interview with Mark Collier, CTO of SecureLogix.

Show Content:

Detailed show notes will be available soon.  Due to the fact that I (Dan) am travelling tomorrow, I’m loading the show up here for listeners.  Show notes should appear late Wednesday night.

I will note that at approximately 22:10 I begin a very interesting 19-minute interview with Mark Collier, CTO of SecureLogix.  With 20 years experience in the field, Mark brings a wealth of expertise to the conversation, which ranged over topics such as the current state of VoIP security, standards, Skype, new projects, and Mark’s dire prediction for 2006.  Well worth a listen.

Also, as a holiday bonus – and because podcasts all over the Internet are participating in this effort, after the regular show outro around 47 minutes, the show includes the UNICEF-benefit song "If Every Day Were Christmas" created by Podsafe for Peace, a collaboration of 32 artists in 9 countries very much along the lines of the "We Are The World" effort back in 1985 – only this time the artists did not physically meet and it was all put together digitally.  If you have not heard it yet, it is well worth a listen.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #7 – December 5, 2005

Synopsis: VoIP security news, comments and opinions


Welcome to Blue Box: The VoIP Security Podcast show #7, a 28-minute podcast from Dan York around news and commentary in the world of VoIP security.

Download the show here (MP3, 26MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Jonathan was travelling this week and unable to participate.  We mentioned previously that Bogdan Materna from VoIPShield Systems would be interviewed this week but unfortunately he fell ill and was unable to join us.  We’ll reschedule that interview in the weeks ahead.  Our thanks go out to Tom Cross of Techtionary.com, who provided some content for today’s show.

Show Content:

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Thank you for listening and please do let us know what you think of the show.

Blue Box Podcast #6 – November 28, 2005

Synopsis: VoIP security news, interview with Mark Spencer of Asterisk/Digium, review of VOIPSEC mailing list.


Welcome to Blue Box: The VoIP Security Podcast show #6, a 42-minute conversation between Dan York and Jonathan Zar around news and commentary in the world of VoIP security.  This show also features a 24-minute interview with Mark Spencer, the original author of Asterisk and President of Digium.

Download the show here (MP3, 40MB) or subscribe to the RSS feed to download the show automatically.

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

This show also features a new musical intro and outro provided to us by listener Martyn Davies from the UK.  Those of you who hated the previous intro of ringing phones can join us in thanking Martyn for his work.  Please do let us know what you think of it!

Show Content:

  • 00:23 – Intro to the show, contact information and how to provide comments.  Welcome to all the new listeners.
  • 01:29 – Comments section – first comment in from John Todd asking what are the primary reasons more commercial and open source VoIP systems do not currently support encryption (i.e. TLS, SRTP, etc.)
  • 04:52 – Comment from Reginal Cross asking about the security of consumer VoIP systems such as Packet8.
  • 08:32 – Martyn’s comment and his new intro.
  • 09:33 – Comment from Tom Cross that his latest Techntionary Tips contains a number of VoIP security-related items
  • 10:50 – News section begins with WiFi Planet: VoIP integrated circuits – security is a concern
  • 11:46 – TMC.net: Making Sense of VoIP Security Threats (by our upcoming guest, Bogdan Materna from VoIPShield)
  • 12:30 – Australian government report on VoIP
  • 13:08 – SearchSecurity.com: Don’t believe the VoIP security hype
  • 14:22 – Start of interview with Mark Spencer, the original author of the open source PBX Asterisk and President of Digium.  Discussion on what’s new, IAX encryption, SRTP bounty.
    • 17:15 – Background on the creation of Asterisk
    • 20:15 – Comparison to commercial PBXs and discussion of bicycle-powered PBXs in Africa
    • 23:05 – How do you deploy Asterisk securely?
    • 23:53 – What is the IAX protocol? How is it different?
    • 27:17 – Patents and intellectual property
    • 28:18 – What’s next for Asterisk and discussion of open source aspects
    • 31:41 – Economics of Digium – could Digium exist without Asterisk?
    • 33:54 – Competition with other PBXs?
    • 35:03 – The new Asterisk 1.2 release and roadmap
    • 37:23 – Interview wrap-up… how developers can help and final thoughts
  • 38:29 – Review of the last week’s traffic on the VOIPSEC public mailing list. Major topics this week included continued discussion of the insecurity of WiFi networks, mention of the Australian government report, a discussion of whether DKIM could be used for securing SIP.
  • 39:19 – Request for feedback – Do you find this VOIPSEC review section of the show useful? Please send comments to blueboxpodcast@gmail.com.
  • 40:04 – Miscellany – looking for suggestions for the lists of VoIP podcasts and VoIP security books currently on the side of the podcast weblog
  • 40:37 – Wrapup of the show and information about how to provide comments.
  • 41:41 – End of show

Comments, suggestions and feedback are welcome either as replies to this post  or via e-mail to blueboxpodcast@gmail.com.  Audio comments sent as attached MP3 files are definitely welcome and will be played in future shows.  You may also call the listener comment line at +1-206-338-6654 to leave a comment there.

Thank you for listening and please do let us know what you think of the show.