diff --git a/um_crypto/kuwo/src/des/mod.rs b/um_crypto/kuwo/src/des/mod.rs
index 998fb0d..ad49e84 100644
--- a/um_crypto/kuwo/src/des/mod.rs
+++ b/um_crypto/kuwo/src/des/mod.rs
@@ -7,7 +7,7 @@ use core::{KuwoDes, Mode};
 use umc_utils::base64;
 
 /// Decrypt string content
-pub fn decrypt_ksing(data: &str, key: &[u8; 8]) -> Result<String> {
+pub fn decrypt_ksing<T: AsRef<[u8]>>(data: T, key: &[u8; 8]) -> Result<String> {
     let mut decoded = base64::decode(data)?;
 
     let des = KuwoDes::new(key, Mode::Decrypt);
@@ -30,7 +30,7 @@ pub fn encrypt_ksing<T: AsRef<[u8]>>(data: T, key: &[u8; 8]) -> Result<String> {
     Ok(base64::encode(data))
 }
 
-pub fn decode_ekey(data: &str, key: &[u8; 8]) -> Result<String> {
+pub fn decode_ekey<T: AsRef<[u8]>>(data: T, key: &[u8; 8]) -> Result<String> {
     let decoded = decrypt_ksing(data, key)?;
     Ok(decoded[16..].to_string())
 }
diff --git a/um_crypto/kuwo/src/lib.rs b/um_crypto/kuwo/src/lib.rs
index 1df2933..ef5affd 100644
--- a/um_crypto/kuwo/src/lib.rs
+++ b/um_crypto/kuwo/src/lib.rs
@@ -135,7 +135,7 @@ pub struct CipherBoDian(QMCv2Cipher);
 
 impl CipherBoDian {
     pub fn new<T: AsRef<[u8]>>(ekey: T) -> Result<Self> {
-        let ekey = des::decode_ekey(&ekey, &SECRET_KEY)?;
+        let ekey = des::decode_ekey(ekey, &SECRET_KEY)?;
         let cipher = CipherV2::new_from_ekey(ekey.as_str())?;
         Ok(Self(cipher))
     }