diff --git a/school/intro-crypto/uebung/05/p/.gitignore b/school/intro-crypto/uebung/05/p/.gitignore
new file mode 100644
index 0000000..53eaa21
--- /dev/null
+++ b/school/intro-crypto/uebung/05/p/.gitignore
@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk
diff --git a/school/intro-crypto/uebung/05/p/target/.rustc_info.json b/school/intro-crypto/uebung/05/p/target/.rustc_info.json
deleted file mode 100644
index e2eee89..0000000
--- a/school/intro-crypto/uebung/05/p/target/.rustc_info.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc_fingerprint":1996615077234892980,"outputs":{"15337506775154344876":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/me/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\nunix\n",""],"1617349019360157463":["___\nlib___.rlib\nlib___.so\nlib___.so\nlib___.a\nlib___.so\n/home/me/.rustup/toolchains/stable-x86_64-unknown-linux-gnu\ndebug_assertions\nproc_macro\ntarget_arch=\"x86_64\"\ntarget_endian=\"little\"\ntarget_env=\"gnu\"\ntarget_family=\"unix\"\ntarget_feature=\"fxsr\"\ntarget_feature=\"sse\"\ntarget_feature=\"sse2\"\ntarget_os=\"linux\"\ntarget_pointer_width=\"64\"\nunix\n",""],"1164083562126845933":["rustc 1.30.1 (1433507eb 2018-11-07)\nbinary: rustc\ncommit-hash: 1433507eba7d1a114e4c6f27ae0e1a74f60f20de\ncommit-date: 2018-11-07\nhost: x86_64-unknown-linux-gnu\nrelease: 1.30.1\nLLVM version: 8.0\n",""]},"successes":{}}
\ No newline at end of file
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.cargo-lock b/school/intro-crypto/uebung/05/p/target/debug/.cargo-lock
deleted file mode 100644
index e69de29..0000000
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46 b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46
deleted file mode 100644
index 9fada81..0000000
--- a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46
+++ /dev/null
@@ -1 +0,0 @@
-0727989ce1aa1e48
\ No newline at end of file
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46.json b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46.json
deleted file mode 100644
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--- a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/bin-p-317830ef682f5c46.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc":3409524444662720818,"features":"[]","target":6265867820755230167,"profile":8404152588981882898,"path":1036222786711178230,"deps":[],"local":[{"MtimeBased":[[1543354048,10023042],".fingerprint/p-317830ef682f5c46/dep-bin-p-317830ef682f5c46"]}],"rustflags":[],"edition":"Edition2015"}
\ No newline at end of file
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/dep-bin-p-317830ef682f5c46 b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-317830ef682f5c46/dep-bin-p-317830ef682f5c46
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diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a
deleted file mode 100644
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--- a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a
+++ /dev/null
@@ -1 +0,0 @@
-5e32215f8f612020
\ No newline at end of file
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a.json b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a.json
deleted file mode 100644
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--- a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/bin-p-a8d68fe4b06c3a8a.json
+++ /dev/null
@@ -1 +0,0 @@
-{"rustc":3409524444662720818,"features":"[]","target":6265867820755230167,"profile":256579555595379356,"path":1036222786711178230,"deps":[],"local":[{"MtimeBased":[[1543354051,669476378],".fingerprint/p-a8d68fe4b06c3a8a/dep-bin-p-a8d68fe4b06c3a8a"]}],"rustflags":[],"edition":"Edition2015"}
\ No newline at end of file
diff --git a/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/dep-bin-p-a8d68fe4b06c3a8a b/school/intro-crypto/uebung/05/p/target/debug/.fingerprint/p-a8d68fe4b06c3a8a/dep-bin-p-a8d68fe4b06c3a8a
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diff --git a/school/intro-crypto/uebung/05/p/target/debug/deps/libp-317830ef682f5c46.rmeta b/school/intro-crypto/uebung/05/p/target/debug/deps/libp-317830ef682f5c46.rmeta
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diff --git a/school/intro-crypto/uebung/05/p/target/debug/deps/p-317830ef682f5c46.d b/school/intro-crypto/uebung/05/p/target/debug/deps/p-317830ef682f5c46.d
deleted file mode 100644
index b3b997a..0000000
--- a/school/intro-crypto/uebung/05/p/target/debug/deps/p-317830ef682f5c46.d
+++ /dev/null
@@ -1,5 +0,0 @@
-/home/me/Dokumente/notes/school/intro-crypto/uebung/05/p/target/debug/deps/p-317830ef682f5c46.rmeta: src/main.rs
-
-/home/me/Dokumente/notes/school/intro-crypto/uebung/05/p/target/debug/deps/p-317830ef682f5c46.d: src/main.rs
-
-src/main.rs:
diff --git a/school/intro-crypto/uebung/05/p/target/debug/deps/p-a8d68fe4b06c3a8a b/school/intro-crypto/uebung/05/p/target/debug/deps/p-a8d68fe4b06c3a8a
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deleted file mode 100644
index 26358a3..0000000
--- a/school/intro-crypto/uebung/05/p/target/debug/deps/p-a8d68fe4b06c3a8a.d
+++ /dev/null
@@ -1,5 +0,0 @@
-/home/me/Dokumente/notes/school/intro-crypto/uebung/05/p/target/debug/deps/p-a8d68fe4b06c3a8a: src/main.rs
-
-/home/me/Dokumente/notes/school/intro-crypto/uebung/05/p/target/debug/deps/p-a8d68fe4b06c3a8a.d: src/main.rs
-
-src/main.rs:
diff --git a/school/intro-crypto/uebung/05/p/target/debug/incremental/p-e5to05pry8bp/s-f72n27uo29-qegj0r-2e1lzfoe3dxpl/dep-graph.bin b/school/intro-crypto/uebung/05/p/target/debug/incremental/p-e5to05pry8bp/s-f72n27uo29-qegj0r-2e1lzfoe3dxpl/dep-graph.bin
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