Announcing Partnership with Upserve POS

February 2020

NVIS, Inc.  is proud to announce partnership with Upserve POS, the #1 point-of-sale provider for upscale restaurants in North America.

Point of Sale (POS) represents a $60 billion industry, projected to more than double in the US alone . Credit card and consumer data theft is rampant, to this day. PCI DSS compliance isnot enough. Millions are still lost daily from establishments due to hacking of data in transit.

Target’s POS system was attacked and its payment card readers were subsequently infected. As a result, attackers  compromised the credit card information of 40 million customers. A year later, POS attack on Home Depot led to the stealing of card data belonging to 56 million customers.

In 2017, Chipotle Mexican Grill suffered a point of sale attack that took place from March 24 to April 18. Its POS system was infected with malware designed to steal card numbers, expiration dates and verification codes. The number of victims wasn’t disclosed, but we can assume that it was huge since Chipotle admitted that most of its 2,250 restaurants during that three week period of time were affected by the attack

With NVIS layer  2 encryption,  Upserve POS will have superior prevention end-to-end, from the POS terminal to the backoffice in the AWS cloud.

Call 1-408-400-3256


Making Blockchain Security Better

A lot of people relate blockchain to digital currency but it is a lot more. This uniquely decentralized platform is rapidly maturing offering multiple applications that even the US Department of Defense is looking at. The depth of these disruptive technologies and how they can accelerate innovation in multiple industries is just now being recognized. So, will these technologies continue and are they secure?

What is blockchain?

As defined by Wikipedia, blockchain is a decentralized and distributed digital ledger that is used to record transactions across many computers so that the record cannot be altered retroactively without the alteration of all subsequent blocks and the collusion of the network.

In general, it is the decentralization and auditing that offer unique security features over todays centralized data. Typical information technology networks today require centralized database access that has been the subject of some of the largest data base hacks costing millions of not billions of dollars. The recent attack on  Equifax hack exposing 143 million Americans is a prime example of the security risks in centralized data at rest depositories.

Cryptology in blockchain

So, can blockchain truly be secure on a public network? Blockchain still runs on the public Internet that depends on encryption technologies to secure it. This digital house of cards uses public encryption keys that are exposed in transactions and susceptible to cracking by ECC (Error Correction Code). There are also concerns that the advances in Quantum Computing could crack all current encryption. The National Institute of Standards and Technology (NIST) has been studying this problem and is focusing on post quantum encryption solution proposals still open in their Post-Quantum Crypto Project.

Current encryption technologies are also static in nature allowing hackers the ability to tracking crypto keys size and patterns. Sophisticated attackers are even using Artificial Intelligence (AI) to monitor crypto static patterns and more rapidly crack crypto keys.  These same patterns can be captured in even multi-factor authentication offering hackers direct access to targeted systems. So, is there a band aide for blockchain security today and in the future?

Blockchain Community based Public/Private Security

Encryption technologies will involve in public networks but as they do there are other was to harden blockchain security. As these capabilities are being addressed, there are companies such as TLC Secure that are offering Virtual Private Networks (VPN) and Network Cloaking Technologies for community of blockchains with member nodes securely connected within their community. This added protection enhances the existing blockchains platform while adding an additional layer of security in both the public and private layer.

The TLC Secure offering called NVIS offers extensible security that enjoins the host nodes of any private blockchain (institutional or enterprise) or public blockchain (i.e., Bitcoin, Ethereum, Litecoin, Ripple, Dash, Zcash, Monero, etc.). Nodes are rendered invisible to hackers, thieves or snooping from the public Internet, thereby reducing risk from exploits, denial-of-service downtime of strategically critical blockchain nodes that can impact cryptocurrency market operations and disrupt transactions. Simply put you can’t hack what you can’t see. TLC Secure is offering a pre-ICO completing a Proof of Concept of these matured and operational technologies. See more in Medium article.

Why Blockchain Technology will continue

From law to technology it just doesn’t seem that blockchain is going away. Initially wanting to regulate blockchain applications, it seems several members of the US Congress are drafting legislation that is intended to recognize certain digital currencies and protect them against interference from the federal government. Clearly the value vs. the risk of blockchain is beginning to be recognized.

Even the 900 billion dollar US Senate defense bill is calling for a block chain security study. As new applications are recognized the use of blockchain technology will increase as newer and more decentralized security technologies become recognized. Companies like TLC Secure will continue to refine and improve these technologies as customers continue to embrace the need for solid security platforms.

Getting Started on the NVIS Network


MacOSX Instructions

1. Wallet:  Have your Ethereum wallet address ready.
2.  Download safeconnect-osx.tgz here from your browser.
3.  Open a bash shell. Extract via “tar zxvf safeconnect-osx.tgz”
4.  Run “sudo ./safeconnect” and when prompted, enter your wallet address
5.  Start** via “sudo ./safeconnect on
6. If you want to stop, enter “sudo ./safeconnect off
** NOTE: If TUNTAP driver is not installed, it is extracted with the safeconnect.
Run sudo installer -pkg tuntap_20150118.pkg
(or tuntap_20191118.pkg for High Sierra or greater)
sudo exec 5<> /dev/tun0

Linux Instructions

NVIS for Linux now has a full CLI installer.

1. Know your unique device address assigned by your Administrator.

2. Download: the Linux NVIS Client t

Ubuntu 22.04 (AWS): tarball
Ubuntu 20.04: tarball
Ubuntu 18.04: tarball
CentOS7: tarball
Save the tarball on your matching system.
3. From a shell, Install the tarball:
sudo tar zxvPf <tarball>
** NOTE: if you do not already have TUNTAP installed, install e.g.:
sudo apt-get install  uml-utilities
sudo tunctl -t tun0
4. Run NVIS:
# nvis
wallet address : <address>
# nvis -h
# nvis -s
# nvis -v
# nvis on

5. If the status is ON, Test by entering::


Minimal Viable Proof: Available Services

Once securely connected, the following services can be accessed using the trusted interface via the private address.

Video Test

After connecting to the NVIS Test Network, there is a video test at Tokyo server:





Our private Ethereum blockchain uses static-nodes. json to define peers. The enode table is:

Geth or other clients should use the bootnode


To get to the geth-cli on a supernode, issue:

sudo geth-attach


Android / iPhone Wallet


NOTE: By default, wallets are setup to use Mainnet.

NVIS Tokens on Mainnet

Contract: 0x035cf462b4dd1c72db85be38f6158761a0401383

Scan the QR code with your BlockWallet to add tokens

Ethereum Mining Pool

Ethereum Block Explorer

As noted above, SSH and PING to any of the listed nodes can be done.