diff --git a/authorized_keys/mathieu b/authorized_keys/mathieu
new file mode 100644
index 0000000..da9cb51
--- /dev/null
+++ b/authorized_keys/mathieu
@@ -0,0 +1,2 @@
+sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIBvOdR4uZJ+/DuARj6efCSEQrsBaV/QCnYi7EYLssximAAAABHNzaDo= mathieu StackHPC key - 2026-03-11
+sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAINNN6uvqHsTRMgEpeP64d48py8KfoRnVFm58fbMaKHYzAAAABHNzaDo= mathieu StackHPC key - 2026-03-11