diff --git a/ws2012/P2P/Folien/P2P-Issues.pdf b/ws2012/P2P/Folien/P2P-Issues.pdf
new file mode 100644
index 00000000..b578ec0d
Binary files /dev/null and b/ws2012/P2P/Folien/P2P-Issues.pdf differ
diff --git a/ws2012/P2P/Papers/Attacking_P2P_networks.pdf b/ws2012/P2P/Papers/Attacking_P2P_networks.pdf
new file mode 100644
index 00000000..fe752eb1
Binary files /dev/null and b/ws2012/P2P/Papers/Attacking_P2P_networks.pdf differ
diff --git a/ws2012/P2P/Papers/Performance Evaluation of a Random-Walk-Based Algorithm for Embedding Dynamically Evolving Trees in Butterflies.PDF b/ws2012/P2P/Papers/Performance Evaluation of a Random-Walk-Based Algorithm for Embedding Dynamically Evolving Trees in Butterflies.PDF
new file mode 100644
index 00000000..a4b688b1
Binary files /dev/null and b/ws2012/P2P/Papers/Performance Evaluation of a Random-Walk-Based Algorithm for Embedding Dynamically Evolving Trees in Butterflies.PDF differ
diff --git a/ws2012/P2P/Papers/Traceback_attack_on_freenet.pdf b/ws2012/P2P/Papers/Traceback_attack_on_freenet.pdf
new file mode 100644
index 00000000..3bf4fe73
Binary files /dev/null and b/ws2012/P2P/Papers/Traceback_attack_on_freenet.pdf differ
diff --git a/ws2012/P2P/Papers/safebook.pdf b/ws2012/P2P/Papers/safebook.pdf
new file mode 100644
index 00000000..495aa285
Binary files /dev/null and b/ws2012/P2P/Papers/safebook.pdf differ