diff --git a/kairos-tx/src/crypto.rs b/kairos-tx/src/crypto.rs
deleted file mode 100644
index 1be64085..00000000
--- a/kairos-tx/src/crypto.rs
+++ /dev/null
@@ -1,71 +0,0 @@
-use std::env;
-
-use crate::error::TxError;
-
-/// This module provides mocked cryptographic functions.
-/// TODO: Remove when the actual `kairos-crypto` package becomes available.
-///
-
-/// Signs the given data using a mock mechanism.
-pub fn sign(data: &[u8], _private_key: &[u8], public_key: &[u8]) -> Vec<u8> {
-    // Note: Private key is unused in the mock implementation but included for interface compatibility.
-    // Mock signature combines data and public_key for simplicity.
-    [data, public_key].concat()
-}
-
-// Name of ENV variable that can disable signature check.
-// NOTE: This is useful for testing purposes.
-pub const SKIP_SIGNATURE_ENV_VAR: &str = "KAIROS_SKIP_SIGNATURE";
-
-/// Verifies a mock signature against the given data and public key.
-/// If the ENV variable "KAIROS_SKIP_SIGNATURE" is set to "true",
-/// the verification step will be skipped.
-pub fn verify(data: &[u8], signature: &[u8], public_key: &[u8]) -> Result<(), TxError> {
-    // Skip verification if disabled by the environment variable.
-    if env::var(SKIP_SIGNATURE_ENV_VAR)
-        .map(|v| v == "true")
-        .unwrap_or(false)
-    {
-        return Ok(());
-    }
-
-    // Re-construct the expected signature using the mock `sign` function logic
-    let expected_signature = sign(data, &[], public_key);
-
-    // Check if the provided signature matches the expected signature
-    if signature != expected_signature.as_slice() {
-        return Err(TxError::InvalidSignature);
-    }
-
-    Ok(())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_sign_and_verify_success() {
-        let data = b"test data";
-        let private_key = b"private_key";
-        let public_key = b"public_key";
-
-        let signature = sign(data, private_key, public_key);
-
-        // This should succeed since we're using the correct public key
-        assert!(verify(data, &signature, public_key).is_ok());
-    }
-
-    #[test]
-    fn test_verify_failure_due_to_incorrect_public_key() {
-        let data = b"test data";
-        let private_key = b"private_key";
-        let public_key = b"public_key";
-        let incorrect_public_key = b"incorrect_public_key";
-
-        let signature = sign(data, private_key, public_key);
-
-        // This should fail since the public key does not match
-        assert!(verify(data, &signature, incorrect_public_key).is_err());
-    }
-}
diff --git a/kairos-tx/src/lib.rs b/kairos-tx/src/lib.rs
index a242f4f8..66735511 100644
--- a/kairos-tx/src/lib.rs
+++ b/kairos-tx/src/lib.rs
@@ -1,5 +1,4 @@
 pub mod asn;
-pub mod crypto;
 pub mod error;
 pub mod helpers;
 pub mod parsers;