Tails is a security-focused Debian based live operating system, no installation required. You can use the live operating system on any computer from a USB stick or a DVD.
The operating system aimed to provide privacy and anonymity, all its communications are forced through the TOR network.
It leaves no traces on the computer and it uses State-of-the-art cryptographic tools to encrypt your files, emails and instant messaging.
New Version Tails 4.5
The Tails 4.5 was released with a security feature Secure Boot, it is designed to protect the system against malicious code execution in the boot process.
While booting, every time the UEFI firmware inspects the binary for valid signature, invalid binary is loaded while the secure boot is enabled, the user is alerted, and the system will refuse to boot.
The new version of Talis also includes fix for several security bugs, it also includes fix several Firefox vulnerabilities targeted by the attackers in the wild.
Also, the Talis comes with the updated version of Tor Browser 9.0.9, you can also download the Tor browser from the download page.
How to Update?
To update with the latest version, just connect your Tails 4.2 or later to the internet and go for the auto-upgrade process, for some reason if the update fails or using an old version try the manual process.