Here are the currently surviving talks from DEF CON 5. If I get more recovered I'll post them here.

Here is the RSS to the complete collection below:
https://www.defcon.org/podcast/defcon-5-audio.rss

DEFCON 5 Hacking Conference Presentation By Bruce Schneier - Why Cryptography Is Harder Than It Looks https://media.defcon.org/dc-5/audio/...ks - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Clovis - Issues with Security and Networked Object Systems https://media.defcon.org/dc-5/audio/...ms - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Cyber - Explanation of Publically Available Crypto tools https://media.defcon.org/dc-5/audio/...ls - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Dan Veeneman - Low Earth Orbit Satellites https://media.defcon.org/dc-5/audio/...es - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Ira Winkler - The Lamer Test https://media.defcon.org/dc-5/audio/...st - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Ken Kumasawa - Phreaking in the 90s https://media.defcon.org/dc-5/audio/...0s - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Se7en - What the Feds Think of us Hackers https://media.defcon.org/dc-5/audio/...rs - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Smaeer Parekh - Why Cryptography is Harder Than it Looks Part Two https://media.defcon.org/dc-5/audio/...wo - Audio.m4b
DEFCON 5 Hacking Conference Presentation By The Dark Tangent - Beer contest update https://media.defcon.org/dc-5/audio/...te - Audio.m4b
DEFCON 5 Hacking Conference Presentation By The Dark Tangent - Capture the Flag (CtF) Contest results and closing https://media.defcon.org/dc-5/audio/...ng - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Voice of Mercury - Live pirate radio update and announcement https://media.defcon.org/dc-5/audio/...nt - Audio.m4b
DEFCON 5 Hacking Conference Presentation By Wrangler - Packet Sniffing https://media.defcon.org/dc-5/audio/...ng - Audio.m4b
DEFCON 5 Hacking Conference Presentation By the Cult of the Dead Cow (cDc) - Live performance and drink creation https://media.defcon.org/dc-5/audio/...on - Audio.m4b
DEFCON 5 Hacking Conference Presentation By the Hobbit and Mudge - CIFS is a load of CACA https://media.defcon.org/dc-5/audio/...CA - Audio.m4b