FAQ

Learn more about how our products and services work and what benefits they bring to users and partners.

What are the benefits of peer-to-peer messaging?

With our chat app, your messages go straight to your recipient. They never touch our servers, which simply alert both devices when they are available to communicate with each other.

Scenario 1

Sender is online, recipient is offline

The sender’s device contacts the server asking if the recipient is online. The server checks and sees they aren’t. The message doesn’t get sent and remains on the sender’s device.

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Scenario 1

Sender is online, recipient is offline

The sender’s device contacts the server asking if the recipient’s is online. The server finds that it isn’t. The message doesn’t get transmitted but remains on the server until the recipient’s device comes online.

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Scenario 2

Sender is offline, recipient comes online

If the sender goes offline before the recipient appears online, the message doesn’t get transmitted and remains on the sender’s device.

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Scenario 2

Sender is offline, recipient comes online

If the sender goes offline before the recipient appears online, the message remains on the server.

Once the recipient’s device comes online, the server sends the message to it even though the sender is no longer online.

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Scenario 3

Sender and recipient are both online

When the sender and the recipient are online at the same time, they can talk and exchange files, knowing that their communication is secure and truly peer-to-peer.

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Scenario 3

Sender and recipient are both online

When the sender and the recipient are online at the same time, they can talk and exchange files, but their communications are not purely peer-to-peer because the messages go through the server.

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Is it safe to use PGP encryption?

The security of a PGP-powered email client depends on the size of the cryptographic keys and their management and storage. We use 4096-bit keys, which, in addition to being unbreakable, are created and stored on the user’s device only.

User generated keys

Our PGP-encrypted email app allows you to generate cryptographic key pairs on your device, with no copies kept on our servers.

In addition, you can export and store backups at a location of your choosing.

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Keys sent to user from server

Our competitors generate PGP keys on their servers and send them to users. If the servers get compromised, however, someone might get hold of the keys and use them to decrypt and read user messages.

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How reliable is ZRTP encryption for voice calls?

In contrast to email and chat, voice encryption leaves no messages behind for someone to decrypt if they get hold of the keys. By creating an encrypted soundwave that disappears the moment it reaches the recipient’s ear, ZRTP is technically the strongest encryption available.

WARNING!In the case of voice calls, the security of your communication depends on the security of your environment. While it prevents interception, encryption doesn’t offer protection against snooping when, for example, the room you are in is bugged.

How do you protect against chip-off and JTAG forensics?

These techniques involve physically removing the eMMC storage chip from your phone and mounting it on a device that can directly extract data from it. You can respond to these risks in two ways: by performing a remote-wipe if your handset is taken away and by ensuring that the data on your chip is properly secured.

Device and storage encryption

Spartan PGP devices feature mandatory full-disc encryption and apps that have their own encrypted databases. To get to your messages, forensics experts should brute-force not only your encryption password but also your app-lock passphrases

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Accessible app storage

Most alternative services offer just apps for encrypted communications. If you can start using an app without entering a password, you have a clear indication that the app is not encrypted, which means its storage can be accessed by spyware and forensics specialists.

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How do you guarantee my messages are private?

At Spartan PGP, we guarantee the privacy of our service in several ways.

First, thanks to the cryptographic protocols our communication applications use – PGP, OTR, OMEMO, ZRTP – the users’ exchange of information is protected by the strongest encryption, which has been under peer review for years. Moreover, all communications remain encrypted during the entire journey from sender to recipient.

Second, we give users control over their PGP encryption keys – keys used for chat and voice messages are ephemeral – and they generate and manage them on their devices. So, when an email message passes through our servers, even if the server is compromised, emails remain unreadable to third parties.

Furthermore, when it comes to chat messaging, communication is strictly peer-to-peer, and it never touches our servers. Servers simply facilitate the correspondence between users. Every message you send leaves your device only if your contact is online.

Why is PGP encryption safest for email communication?

You need to know that PGP is as safe as the way it is implemented. And we do that well.

One of the most important aspects of encryption with PGP is the size of the encryption keys. While in some old versions the size of the keys is smaller, and keys can be brute-forced by modern computers, Spartan PGP uses 4096-bit RSA keys that remain unbreakable.

Also, key size does matter, but so does key generation and storage. In most environments, PGP keys are created and kept on the servers of the company providing the service. This, however, may put your information at risk should those servers be compromised and the keys can be used to decrypt your emails. Spartan PGP puts control in users’ hands and lets them create, store and manage their encryption keys.

Can I use your devices when traveling abroad?

Yes, with a free data plan.

Spartan PGP devices come with a multi-IMSI SIM card, which guarantees that you never lose connection wherever you may roam. Aside from staying connected all over the globe, you won’t have to pay for roaming and data.

What encryption do your apps use?

Spartan Mail uses PGP encryption with 4096-bit RSA keys and digital signatures. For one-on-one conversations, Spartan Chat uses OTR encryption with 4096-bit Diffie-Hellman, AES-256, and SHA-2 hashing. The same app uses OMEMO encryption for group conversations, relying on the Double Ratchet protocol, with AES-256 and SHA-2. For voice over IP (VoIP) calls, Spartan Chat uses the ZRTP protocol.

How do you protect against chip-off?

Chip-off is a technique that relies on physically removing the eMMC storage chip from your phone, your phone’s hard drive, so that it can be mounted to a machine that can extract the data from it.

A way to counter chip-off is to use the remote wipe functionality of our products if your device gets stolen.

Another way we at Spartan PGP secure the information of our users is by offering handsets with full-disc encryption with a separate password. And aside from the remote wipe option and the apps’ encrypted databases, full-disc encryption protects you from malicious actors who will need to first brute-force your encryption password and then crack your app passwords.

Are there any security backdoors in your products?

No.

Тhe integrity of our customers’ communications is a number one priority for us. And while a backdoor is a “way in” for friends, it is also there for enemies. We cannot afford to threaten the security of our users or our reputation as one of the best providers of encrypted communication solutions.

Still Have Questions?

Please, do not hesitate to send us a message regarding Spartan PGP’s solutions, partner program, or with a general inquiry. We’re here to help!

WhatsApp: +1 431 388 1488