diff --git a/src/cmd_info.rs b/src/cmd_info.rs
index f134ddd..ab3fe7c 100644
--- a/src/cmd_info.rs
+++ b/src/cmd_info.rs
@@ -9,7 +9,7 @@ use rust_util::{iff, opt_result, success, XResult};
 use rust_util::util_time::get_current_millis;
 use simpledateformat::format_human2;
 
-use crate::file;
+use crate::{file, util};
 
 #[derive(Debug, Args)]
 pub struct CmdInfo {
@@ -71,7 +71,7 @@ pub fn info(cmd_info: CmdInfo) -> XResult<()> {
     let encryption_algorithm = if let Some(encryption_algorithm) = &meta.encryption_algorithm {
         encryption_algorithm.to_string()
     } else {
-        "AES/GCM (default)".to_string()
+        format!("{} (default)", util::TINY_ENC_AES_GCM)
     };
     infos.push(format!("{}: {}", header("Encryption algorithm"), encryption_algorithm));
 
diff --git a/src/spec.rs b/src/spec.rs
index 48a84ad..03bd0d9 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -4,7 +4,7 @@ use rust_util::util_time;
 use rust_util::util_time::get_millis;
 use serde::{Deserialize, Serialize};
 
-use crate::util::{encode_base64, get_user_agent};
+use crate::util::{encode_base64, get_user_agent, TINY_ENC_AES_GCM};
 
 pub const TINY_ENCRYPT_VERSION_10: &'static str = "1.0";
 pub const TINY_ENCRYPT_VERSION_11: &'static str = "1.1";
@@ -96,7 +96,7 @@ impl TinyEncryptMeta {
             ecdh_point: None,
             envelop: None,
             envelops: Some(envelops),
-            encryption_algorithm: None, // use none default
+            encryption_algorithm: Some(TINY_ENC_AES_GCM.to_string()),
             nonce: encode_base64(nonce),
             file_length: metadata.len(),
             file_last_modified: match metadata.modified() {
diff --git a/src/util.rs b/src/util.rs
index 2bd98c2..cb4de01 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -12,6 +12,8 @@ pub const ENC_AES256_GCM_P256: &str = "aes256-gcm-p256";
 pub const TINY_ENC_FILE_EXT: &str = ".tinyenc";
 pub const TINY_ENC_CONFIG_FILE: &str = "~/.tinyencrypt/config-rs.json";
 
+pub const TINY_ENC_AES_GCM: &str = "AES/GCM";
+
 pub const TINY_ENC_MAGIC_TAG: u16 = 0x01;
 
 pub fn require_tiny_enc_file_and_exists(path: impl AsRef<Path>) -> XResult<()> {