tiCrypt 2.18.1

Compute Disk Usage

ResearcherRequires: User role

Permission requirements

• Vault Files and Directories
  • View the history of their files (sharing, project tags, deletion)
  • View their files and files shared with them (needed to download)
  • Get the keys of their files and files shared with them (needed to download)
  • Download the content of files they can access
  • View their directories and their groups' directories
  • View any user's Vault storage use

Compute Disk Usage for Directories

bulk-action

1. Go to the Vault icon in the top left panel.
2. Click the My Files section on the left panel.
3. Select the directory(ies) for which you want to compute the disk usage.
4. Click the Open full menu button in the top center panel.
5. Select Compute disk usage.
6. View the computed usage to the right of the directory(ies) under the Size column in the Vault.

Only the selected folders are measured. The task tray shows the task "Scanning files and directories" while tiCrypt adds up their contents. When it finishes, each folder's size also appears in parentheses after its name in the tree. You can also right-click a folder in the tree and select Compute disk usage.

Confirmations, Errors & Solutions

Cannot View Any Files to Compute Disk Usage

You do not have permission to view files or directories.

Ask Your Admin to Allow You Access to Your Files

You do not have permission to view your files. Contact your admin to enable the appropriate permissions or assign you a user role.

Compute SHA-256 for a File

1. Go to the Vault icon in the top left panel.
2. Click the My Files section on the left panel.
3. Select the file for which you want to compute the SHA-256 string.
4. Click the Open full menu button in the top center panel.
5. Select Compute SHA-256.
6. In the prompt, view the computed SHA-256 hash.
7. Click Copy to copy the hash.
8. Run sha256sum filename on your local machine and compare the output to the Vault hash to verify file integrity.

The prompt is titled "Computing SHA256 hash for name" and shows a progress bar until the hash is ready. Copy stays disabled until then, and copying shows "Hash copied to the clipboard". tiCrypt decrypts the file in your browser to compute the hash, so it may ask you to unlock your key first. Compute SHA-256 is offered under the same conditions as View: one file, the permission to download files, and the file's project active in your session.

Compute Disk Usage for Deleted Directories

bulk-action

1. Go to the Vault icon in the top left panel.
2. Click the Trash section on the left panel.
3. Select the deleted directory(ies) for which you want to compute the disk usage.
4. Click the Open full menu button in the top center panel.
5. Select Compute disk usage.
6. View the computed usage to the right of the directory(ies) under the Size column in the Vault.

Compute SHA-256 for a Deleted File

1. Go to the Vault icon in the top left panel.
2. Click the Trash section on the left panel.
3. Select the deleted file for which you want to compute the SHA-256 string.
4. Click the Open full menu button in the top center panel.
5. Select Compute SHA-256.
6. In the prompt, view the computed SHA-256 hash.
7. Click Copy to copy the hash.
8. Run sha256sum filename on your local machine and compare the output to the Vault hash to verify file integrity.

Effects of Computing SHA-256

Computing a SHA-256 hash verifies file integrity. The file is decrypted in your browser to compute it, and the hash itself reveals nothing about the file's contents. During large transfers, comparing the local machine's hash with the Vault's hash detects any discrepancies. Even a single-bit change results in different hashes, indicating a transfer issue. If both hashes match exactly, the transfer succeeded.

note

SHA-256 computation applies to any non-empty file. For an empty file, tiCrypt shows "SHA-256 hash cannot be computed for empty files".