diff --git a/sheet02/a2/b-privatekey.txt b/sheet02/a2/b-privatekey.txt
new file mode 100644
index 0000000..d5ca775
--- /dev/null
+++ b/sheet02/a2/b-privatekey.txt
@@ -0,0 +1 @@
+ME4CAQAwEAYHKoZIzj0CAQYFK4EEACIENzA1AgEBBDA/BgxBUzJUc3MfZVBIdPTbQfIdf4SABYZJlno8rUPkhBRrK3VkpEhyGdviYUPViz4=
\ No newline at end of file
diff --git a/sheet02/a2/b-publickey.txt b/sheet02/a2/b-publickey.txt
new file mode 100644
index 0000000..069de09
--- /dev/null
+++ b/sheet02/a2/b-publickey.txt
@@ -0,0 +1 @@
+MHYwEAYHKoZIzj0CAQYFK4EEACIDYgAEVHteuMnscItIHycwEZ80P44WyIWmL7PmeN6HLRAu8IJsLKX6BTDawN0MezskF68oQ9Ft7zy2u4v2aaYB4tgUv+0YG7zEwFr0ofqSqFFPSLr0qrVRvXi/H7Bux8tYVgaN
\ No newline at end of file
diff --git a/sheet02/a2/b-signature.txt b/sheet02/a2/b-signature.txt
new file mode 100644
index 0000000..7a7c4f7
--- /dev/null
+++ b/sheet02/a2/b-signature.txt
@@ -0,0 +1 @@
+MGQCMHq04CPgDiSaWPXb3LiuBrb97aV4JjinA5gIuEIFjFYLD1jYdECBdV/aHLLYsyMYnAIwedsP6qJKK4Y2uLgn3XLxbHgDKxf+eq07Rptmn/LttHTpWjtTfaLERM+Uh2BUGmMt
\ No newline at end of file
diff --git a/sheet02/a2/c.txt b/sheet02/a2/c.txt
index e69de29..47301f6 100644
--- a/sheet02/a2/c.txt
+++ b/sheet02/a2/c.txt
@@ -0,0 +1,5 @@
+copy the publickey into a .pem file that starts with -----BEGIN PUBLIC KEY----- and ends with -----END PUBLIC KEY----- and has linebreaks after 64 chars.
+then decode the base64 signature
+base64 -d b-signature.txt > signature.bin
+verify using openssl
+openssl dgst -sha256 -verify c-pubkey.pem -signature signature.bin plaintext.txt 
\ No newline at end of file