Am 19.12.2008 um 11:24 schrieb Eugen Leitl:
This is off-topic, but isn't UDP making data retention more difficult than TCP/IP.
Since you seem to talk about Germany: Again, data retention does and will not happen on a per-packet basis and especially not on the transport layer (TCP/UDP) with the current law. There will "only" be records which dynamic IP-address was assigned to which customer at which time. That's it. See Paragraph 4 in  (German).
 http://de.wikipedia.org/wiki/Vorratsdatenspeicherung#Verkehrsdatenspeicherung Sven
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