diff --git a/DP3T - Interoperability Decentralized Proximity Tracing Specification (Preview).pdf b/DP3T - Interoperability Decentralized Proximity Tracing Specification (Preview).pdf
new file mode 100644
index 0000000..2397603
Binary files /dev/null and b/DP3T - Interoperability Decentralized Proximity Tracing Specification (Preview).pdf differ