diff --git a/ws2012/P2P/uebungen/12/exercise12.pdf b/ws2012/P2P/uebungen/12/exercise12.pdf
new file mode 100644
index 00000000..b10bcc31
Binary files /dev/null and b/ws2012/P2P/uebungen/12/exercise12.pdf differ
diff --git a/ws2012/P2P/uebungen/12/exercise12_solution.odt b/ws2012/P2P/uebungen/12/exercise12_solution.odt
new file mode 100644
index 00000000..cb76ebe6
Binary files /dev/null and b/ws2012/P2P/uebungen/12/exercise12_solution.odt differ
diff --git a/ws2012/P2P/uebungen/12/exercise12_solution.pdf b/ws2012/P2P/uebungen/12/exercise12_solution.pdf
new file mode 100644
index 00000000..dc90a87b
Binary files /dev/null and b/ws2012/P2P/uebungen/12/exercise12_solution.pdf differ
diff --git a/ws2012/P2P/uebungen/12/slides12.pdf b/ws2012/P2P/uebungen/12/slides12.pdf
new file mode 100644
index 00000000..d015bb91
Binary files /dev/null and b/ws2012/P2P/uebungen/12/slides12.pdf differ