diff --git a/src/cli/args.rs b/src/cli/args.rs
index 7801b5b..8418134 100644
--- a/src/cli/args.rs
+++ b/src/cli/args.rs
@@ -76,6 +76,14 @@ pub enum Arguments {
         repo_path: String,
         path: String
     },
+    Diff {
+        repo_path_old: String,
+        backup_name_old: String,
+        inode_old: Option<String>,
+        repo_path_new: String,
+        backup_name_new: String,
+        inode_new: Option<String>
+    },
     Analyze {
         repo_path: String
     },
@@ -313,6 +321,11 @@ pub fn parse() -> Arguments {
             (@arg REPO: +required "repository path")
             (@arg PATH: +required "the file path")
         )
+        (@subcommand diff =>
+            (about: "display difference between two backup versions")
+            (@arg OLD: +required "old repository::backup[::subpath] path")
+            (@arg NEW: +required "new repository::backup[::subpath] path")
+        )
         (@subcommand config =>
             (about: "changes the configuration")
             (@arg REPO: +required "path of the repository")
@@ -460,6 +473,18 @@ pub fn parse() -> Arguments {
             path: args.value_of("PATH").unwrap().to_string()
         }
     }
+    if let Some(args) = args.subcommand_matches("diff") {
+        let (repository_old, backup_old, inode_old) = parse_repo_path(args.value_of("OLD").unwrap(), Some(true), None);
+        let (repository_new, backup_new, inode_new) = parse_repo_path(args.value_of("NEW").unwrap(), Some(true), None);
+        return Arguments::Diff {
+            repo_path_old: repository_old.to_string(),
+            backup_name_old: backup_old.unwrap().to_string(),
+            inode_old: inode_old.map(|v| v.to_string()),
+            repo_path_new: repository_new.to_string(),
+            backup_name_new: backup_new.unwrap().to_string(),
+            inode_new: inode_new.map(|v| v.to_string()),            
+        }
+    }
     if let Some(args) = args.subcommand_matches("analyze") {
         let (repository, _backup, _inode) = parse_repo_path(args.value_of("REPO").unwrap(), Some(false), Some(false));
         return Arguments::Analyze {
diff --git a/src/cli/mod.rs b/src/cli/mod.rs
index c1407fc..962e89d 100644
--- a/src/cli/mod.rs
+++ b/src/cli/mod.rs
@@ -95,7 +95,6 @@ fn print_inode(inode: &Inode) {
     println!("Permissions: {:3o}", inode.mode);
     println!("User: {}", inode.user);
     println!("Group: {}", inode.group);
-    println!("Access time: {}", Local.timestamp(inode.access_time, 0).to_rfc2822());
     println!("Modification time: {}", Local.timestamp(inode.modify_time, 0).to_rfc2822());
     if let Some(ref target) = inode.symlink_target {
         println!("Symlink target: {}", target);
@@ -425,6 +424,25 @@ pub fn run() {
                 println!("{}", format_inode_one_line(&inode));
             }
         },
+        Arguments::Diff{repo_path_old, backup_name_old, inode_old, repo_path_new, backup_name_new, inode_new} => {
+            if repo_path_old != repo_path_new {
+                error!("Can only run diff on same repository");
+                exit(2)
+            }
+            let mut repo = open_repository(&repo_path_old);
+            let backup_old = get_backup(&repo, &backup_name_old);
+            let backup_new = get_backup(&repo, &backup_name_new);
+            let inode1 = checked(repo.get_backup_inode(&backup_old, inode_old.unwrap_or_else(|| "/".to_string())), "load subpath inode");
+            let inode2 = checked(repo.get_backup_inode(&backup_new, inode_new.unwrap_or_else(|| "/".to_string())), "load subpath inode");
+            let diffs = checked(repo.find_differences(&inode1, &inode2), "find differences");
+            for diff in diffs {
+                println!("{} {:?}", match diff.0 {
+                    DiffType::Add => "add",
+                    DiffType::Mod => "mod",
+                    DiffType::Del => "del"
+                }, diff.1);
+            }
+        },
         Arguments::Config{repo_path, bundle_size, chunker, compression, encryption, hash} => {
             let mut repo = open_repository(&repo_path);
             if let Some(bundle_size) = bundle_size {
diff --git a/src/mount.rs b/src/mount.rs
index c406498..b0f8465 100644
--- a/src/mount.rs
+++ b/src/mount.rs
@@ -87,7 +87,7 @@ impl FuseInode {
             ino: self.num,
             size: self.inode.size,
             blocks: self.inode.size / 512,
-            atime: Timespec::new(self.inode.access_time, 0),
+            atime: Timespec::new(self.inode.modify_time, 0),
             mtime: Timespec::new(self.inode.modify_time, 0),
             ctime: Timespec::new(0, 0),
             crtime: Timespec::new(0, 0),
diff --git a/src/prelude.rs b/src/prelude.rs
index cc63c92..04d9007 100644
--- a/src/prelude.rs
+++ b/src/prelude.rs
@@ -1,7 +1,7 @@
 pub use ::util::*;
 pub use ::bundledb::{BundleReader, BundleMode, BundleWriter, BundleInfo, BundleId, BundleDbError, BundleDb, BundleWriterError};
 pub use ::chunker::{ChunkerType, Chunker, ChunkerStatus, IChunker, ChunkerError};
-pub use ::repository::{Repository, Backup, Config, RepositoryError, RepositoryInfo, Inode, FileType, RepositoryIntegrityError, BackupFileError, BackupError, BackupOptions, BundleAnalysis, FileContents};
+pub use ::repository::{Repository, Backup, Config, RepositoryError, RepositoryInfo, Inode, FileType, RepositoryIntegrityError, BackupFileError, BackupError, BackupOptions, BundleAnalysis, FileContents, DiffType};
 pub use ::index::{Index, Location, IndexError};
 pub use ::mount::FuseFilesystem;
 
diff --git a/src/repository/backup.rs b/src/repository/backup.rs
index 4fdbc9c..220b4d7 100644
--- a/src/repository/backup.rs
+++ b/src/repository/backup.rs
@@ -31,6 +31,11 @@ pub struct BackupOptions {
 }
 
 
+pub enum DiffType {
+    Add, Mod, Del
+}
+
+
 impl Repository {
     pub fn get_backups(&self) -> Result<HashMap<String, Backup>, RepositoryError> {
         Ok(try!(Backup::get_all_from(&self.crypto.lock().unwrap(), &self.backups_path)))
@@ -159,7 +164,7 @@ impl Repository {
         let meta_size = 1000; // add 1000 for encoded metadata
         backup.total_data_size += inode.size + meta_size;
         if let Some(ref_inode) = reference {
-            if !ref_inode.is_unchanged(&inode) {
+            if !ref_inode.is_same_meta_quick(&inode) {
                 backup.changed_data_size += inode.size + meta_size;
             }
         } else {
@@ -295,4 +300,52 @@ impl Repository {
         versions.sort_by_key(|v| v.1.modify_time);
         Ok(versions)
     }
+
+    #[inline]
+    fn find_differences_recurse(&mut self, inode1: &Inode, inode2: &Inode, path: PathBuf, diffs: &mut Vec<(DiffType, PathBuf)>) -> Result<(), RepositoryError> {
+        if !inode1.is_same_meta(inode2) || inode1.contents != inode2.contents {
+            diffs.push((DiffType::Mod, path.clone()));
+        }
+        if let Some(ref children1) = inode1.children {
+            if let Some(ref children2) = inode2.children {
+                for name in children1.keys() {
+                    if !children2.contains_key(name) {
+                        diffs.push((DiffType::Del, path.join(name)));
+                    }
+                }
+            } else {
+                for name in children1.keys() {
+                    diffs.push((DiffType::Del, path.join(name)));
+                }
+            }
+        }
+        if let Some(ref children2) = inode2.children {
+            if let Some(ref children1) = inode1.children {
+                for (name, chunks2) in children2 {
+                    if let Some(chunks1) = children1.get(name) {
+                        if chunks1 != chunks2 {
+                            let inode1 = try!(self.get_inode(chunks1));
+                            let inode2 = try!(self.get_inode(chunks2));
+                            try!(self.find_differences_recurse(&inode1, &inode2, path.join(name), diffs));
+                        }
+                    } else {
+                        diffs.push((DiffType::Add, path.join(name)));
+                    }
+                }
+            } else {
+                for name in children2.keys() {
+                    diffs.push((DiffType::Add, path.join(name)));
+                }
+            }
+        }
+        Ok(())
+    }
+
+    #[inline]
+    pub fn find_differences(&mut self, inode1: &Inode, inode2: &Inode) -> Result<Vec<(DiffType, PathBuf)>, RepositoryError> {
+        let mut diffs = vec![];
+        let path = PathBuf::from("/");
+        try!(self.find_differences_recurse(inode1, inode2, path, &mut diffs));
+        Ok(diffs)
+    }
 }
diff --git a/src/repository/metadata.rs b/src/repository/metadata.rs
index 6b45511..5b356cd 100644
--- a/src/repository/metadata.rs
+++ b/src/repository/metadata.rs
@@ -111,9 +111,9 @@ pub struct Inode {
     pub mode: u32,
     pub user: u32,
     pub group: u32,
-    pub access_time: i64,
+    pub __old_access_time: i64,
     pub modify_time: i64,
-    pub create_time: i64,
+    pub __old_create_time: i64,
     pub symlink_target: Option<String>,
     pub contents: Option<FileContents>,
     pub children: Option<BTreeMap<String, ChunkList>>
@@ -127,9 +127,9 @@ impl Default for Inode {
             mode: 0o644,
             user: 1000,
             group: 1000,
-            access_time: 0,
+            __old_access_time: 0,
             modify_time: 0,
-            create_time: 0,
+            __old_create_time: 0,
             symlink_target: None,
             contents: None,
             children: None
@@ -143,9 +143,9 @@ serde_impl!(Inode(u8) {
     mode: u32 => 3,
     user: u32 => 4,
     group: u32 => 5,
-    access_time: i64 => 6,
+    __old_access_time: i64 => 6,
     modify_time: i64 => 7,
-    create_time: i64 => 8,
+    __old_create_time: i64 => 8,
     symlink_target: Option<String> => 9,
     contents: Option<FileContents> => 10,
     children: BTreeMap<String, ChunkList> => 11
@@ -213,7 +213,13 @@ impl Inode {
         Ok(file)
     }
 
-    pub fn is_unchanged(&self, other: &Inode) -> bool {
+    pub fn is_same_meta(&self, other: &Inode) -> bool {
+        self.file_type == other.file_type && self.size == other.size && self.mode == other.mode
+        && self.user == other.user && self.group == other.group && self.name == other.name
+        && self.modify_time == other.modify_time && self.symlink_target == other.symlink_target
+    }
+
+    pub fn is_same_meta_quick(&self, other: &Inode) -> bool {
         self.modify_time == other.modify_time
         && self.file_type == other.file_type
         && self.size == other.size
@@ -236,7 +242,7 @@ impl Repository {
         let mut inode = try!(Inode::get_from(path.as_ref()));
         if inode.file_type == FileType::File && inode.size > 0 {
             if let Some(reference) = reference {
-                if reference.is_unchanged(&inode) {
+                if reference.is_same_meta_quick(&inode) {
                     inode.contents = reference.contents.clone();
                     return Ok(inode)
                 }
diff --git a/src/repository/mod.rs b/src/repository/mod.rs
index d6b55cf..8363716 100644
--- a/src/repository/mod.rs
+++ b/src/repository/mod.rs
@@ -22,7 +22,7 @@ use std::io::Write;
 pub use self::error::RepositoryError;
 pub use self::config::Config;
 pub use self::metadata::{Inode, FileType, FileContents};
-pub use self::backup::{BackupError, BackupOptions};
+pub use self::backup::{BackupError, BackupOptions, DiffType};
 pub use self::backup_file::{Backup, BackupFileError};
 pub use self::integrity::RepositoryIntegrityError;
 pub use self::info::{RepositoryInfo, BundleAnalysis};