diff --git a/Cargo.lock b/Cargo.lock
index c69b9a6..d4b7aab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1421,9 +1421,9 @@ dependencies = [
 
 [[package]]
 name = "simpledateformat"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd2436140481bbe945c4d6deab521cf1ac52d73766e3c5d28d2c65e2635ae115"
+checksum = "d99ace355f41f2391428701c164540ab9b0b644c0aa935f3eefe773dc0072a3e"
 dependencies = [
  "chrono",
  "quick-error",
diff --git a/Cargo.toml b/Cargo.toml
index 67bc0d1..972a97f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ reqwest = { version = "0.11.14", features = ["blocking", "rustls", "rustls-tls"]
 rust_util = "0.6.41"
 serde = { version = "1.0.152", features = ["derive"] }
 serde_json = "1.0.93"
-simpledateformat = "0.1.3"
+simpledateformat = "0.1.4"
 yubico_manager = "0.9.0"
 
 [profile.release]
diff --git a/src/cmd_info.rs b/src/cmd_info.rs
index 794eb20..cfdab2b 100644
--- a/src/cmd_info.rs
+++ b/src/cmd_info.rs
@@ -3,7 +3,11 @@ use std::fs::File;
 use std::ops::Add;
 use std::path::PathBuf;
 use std::time::{Duration, SystemTime};
-use rust_util::{iff, information, opt_result, simple_error, success, XResult};
+
+use rust_util::{iff, opt_result, success, XResult};
+use rust_util::util_time::get_current_millis;
+use simpledateformat::format_human2;
+
 use crate::file;
 
 pub fn info(path: PathBuf, raw_meta: bool) -> XResult<()> {
@@ -20,15 +24,24 @@ pub fn info(path: PathBuf, raw_meta: bool) -> XResult<()> {
     let mut infos = vec![];
     infos.push("Tiny Encrypt File Info".to_string());
     let compressed = if meta.compress { " [compressed]" } else { "" };
-    infos.push(format!("{}: {}{}", header("File"), path_display, compressed));
+    infos.push(format!("{}: {}{}", header("File name"), path_display, compressed));
     infos.push(format!("{}: {} bytes", header("File size"), meta.file_length));
     infos.push(format!("{}: Version: {}, Agent: {}",
-                       header("Enc file summary"), meta.version, meta.user_agent)
+                       header("File summary"), meta.version, meta.user_agent)
     );
 
+    let now_millis = get_current_millis() as u64;
     let fmt = simpledateformat::fmt("EEE MMM dd HH:mm:ss z yyyy").unwrap();
-    infos.push(format!("{}: {}", header("Last modified"), fmt.format_local(from_unix_epoch(meta.file_last_modified))));
-    infos.push(format!("{}: {}", header("Enc file created"), fmt.format_local(from_unix_epoch(meta.created))));
+    infos.push(format!("{}: {}, {} ago",
+                       header("Last modified"),
+                       fmt.format_local(from_unix_epoch(meta.file_last_modified)),
+                       format_human2(Duration::from_millis(now_millis - meta.file_last_modified))
+    ));
+    infos.push(format!("{}: {}, {} ago",
+                       header("Created"),
+                       fmt.format_local(from_unix_epoch(meta.created)),
+                       format_human2(Duration::from_millis(now_millis - meta.created))
+    ));
 
     meta.envelops.as_ref().map(|envelops| envelops.iter().enumerate().for_each(|(i, envelop)| {
         infos.push(format!("{}: {}{}{}",
diff --git a/src/spec.rs b/src/spec.rs
index 3abc1a5..4019683 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -2,6 +2,11 @@ use serde::{Deserialize, Serialize};
 
 pub const TINY_ENCRYPT_VERSION: &'static str = "1.0";
 
+pub const ENVELOP_TYPE_KMS: &'static str = "kms";
+pub const ENVELOP_TYPE_PGP: &'static str = "pgp";
+pub const ENVELOP_TYPE_AGE: &'static str = "age";
+pub const ENVELOP_TYPE_ECDH: &'static str = "ecdh";
+
 /// Specification: [Tiny Encrypt Spec V1.1](https://git.hatter.ink/hatter/tiny-encrypt-java/src/branch/master/TinyEncryptSpecV1.1.md)
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -51,17 +56,29 @@ impl TinyEncryptMeta {
         if self.envelops.is_none() {
             self.envelops = Some(vec![]);
         }
-        self.normalize_ppg_envelop();
+        self.normalize_envelop();
+        self.normalize_pgp_envelop();
         self.normalize_age_envelop();
         self.normalize_ecdh_envelop();
-        self.normalize_envelop();
     }
 
-    fn normalize_ppg_envelop(&mut self) {
+    fn normalize_envelop(&mut self) {
+        if let (Some(envelop), Some(envelops)) = (&self.envelop, &mut self.envelops) {
+            envelops.push(TinyEncryptEnvelop {
+                r#type: ENVELOP_TYPE_KMS.into(),
+                kid: "".into(),
+                desc: None,
+                encrypted_key: envelop.into(),
+            });
+            self.envelop = None;
+        }
+    }
+
+    fn normalize_pgp_envelop(&mut self) {
         if let (Some(pgp_envelop), Some(pgp_fingerprint), Some(envelops))
             = (&self.pgp_envelop, &self.pgp_fingerprint, &mut self.envelops) {
             envelops.push(TinyEncryptEnvelop {
-                r#type: "pgp".to_string(),
+                r#type: ENVELOP_TYPE_PGP.into(),
                 kid: pgp_fingerprint.into(),
                 desc: None,
                 encrypted_key: pgp_envelop.into(),
@@ -75,7 +92,7 @@ impl TinyEncryptMeta {
         if let (Some(age_envelop), Some(age_recipient), Some(envelops))
             = (&self.age_envelop, &self.age_recipient, &mut self.envelops) {
             envelops.push(TinyEncryptEnvelop {
-                r#type: "age".to_string(),
+                r#type: ENVELOP_TYPE_AGE.into(),
                 kid: age_recipient.into(),
                 desc: None,
                 encrypted_key: age_envelop.into(),
@@ -89,7 +106,7 @@ impl TinyEncryptMeta {
         if let (Some(ecdh_envelop), Some(ecdh_point), Some(envelops))
             = (&self.ecdh_envelop, &self.ecdh_point, &mut self.envelops) {
             envelops.push(TinyEncryptEnvelop {
-                r#type: "ecdh".to_string(),
+                r#type: ENVELOP_TYPE_ECDH.into(),
                 kid: ecdh_point.into(),
                 desc: None,
                 encrypted_key: ecdh_envelop.into(),
@@ -98,16 +115,4 @@ impl TinyEncryptMeta {
             self.ecdh_point = None;
         }
     }
-
-    fn normalize_envelop(&mut self) {
-        if let (Some(envelop), Some(envelops)) = (&self.envelop, &mut self.envelops) {
-            envelops.push(TinyEncryptEnvelop {
-                r#type: "kms".to_string(),
-                kid: "".into(),
-                desc: None,
-                encrypted_key: envelop.into(),
-            });
-            self.envelop = None;
-        }
-    }
 }