diff --git a/crypto/Cargo.lock b/crypto/Cargo.lock
new file mode 100644
index 0000000..f1dc1c8
--- /dev/null
+++ b/crypto/Cargo.lock
@@ -0,0 +1,214 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
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+ "sha2",
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+ "zeroize",
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+[[package]]
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+[[package]]
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+ "libc",
+ "wasi",
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+ "subtle",
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+[[package]]
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+ "elliptic-curve",
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+ "opaque-debug",
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+[[package]]
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+[[package]]
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+[[package]]
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+[[package]]
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diff --git a/crypto/Cargo.toml b/crypto/Cargo.toml
new file mode 100644
index 0000000..f632582
--- /dev/null
+++ b/crypto/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "crypto"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+ecdsa = "0.5.0"
+ed25519 = "1.0.1"
+digest = "0.8.1"
+elliptic-curve = "0.3.0"
+k256 = "0.2.0"
+p256 = "0.2.0"
+p384 = "0.1.0"
+p521 = "0.0.0"
+
diff --git a/crypto/src/main.rs b/crypto/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/crypto/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}