Adds Prokey Optimum - Open source hardware wallet

6_Privacy_and-Security_Gadgets.md

@@ -36,6 +36,7 @@ See Also, [The Hackers Hardware Toolkit](https://raw.githubusercontent.com/yadox
 **Faraday Pouch**<br>[![__](https://i.ibb.co/HBBG0QL/3.jpg)](https://amzn.to/3bIkfw4) | [Faraday Shield](https://en.wikipedia.org/wiki/Faraday_cage) is an enclosure that blocks electromagnetic fields. It is useful to keep any device which could be hacked through sending or receiving signals in such a case, such as car keys, or a smart phone. [Larger](https://amzn.to/2UTZOGM) versions are availible for tablets and latops.
 **RFID Blocking Cards**<br>[![__](https://i.ibb.co/m4GtMdj/4.jpg)](https://amzn.to/38ycMxN) | If you are concerned about card skimming, you can use an RFID blocking sleeve to protect your contactless payment and identity cards. However there are proportionately very few RFID-skimmer crimes reported, and most credit cards have a low contactless limit
 **Web Cam Covers**<br>[![__](https://i.ibb.co/X7B1WsH/5.jpg)](https://amzn.to/2uEz16H) | Web cam covers are quite self-exoplanetary, they physically conceal the lenses on your laptop or phone camera, to prevent a malicious actor (hacker, government, corporation etc) from watching you through the camera. It may sound paranoid, but unfortunately it happens, and it is a relatively simply process for someone to gain remote access to a webcam. Even Mark Zuckerberg [covers his webcam](https://www.geek.com/tech/mark-zuckerberg-tapes-up-his-webcam-and-snowden-says-you-should-too-1659083/)! Of course you could just use some tape, rather than buying a cover
+**Prokey Wallet**<br>[![__](https://i.ibb.co/m53MmCL/prokey.jpg)](https://prokey.io/?reflink=67e4a39bc5cd4c04bd7f38b50b041c1f) | Prokey Optimum is a secure, easy-to-use offline hardware wallet, that works directly through the browser (on Windows, Mac, Linux and Android), without the need for installing any apps. Both the firmware and browser app is [open source](https://github.com/prokey-io), and it natively supports [over 1000 coins and tokens](https://prokey.io/all-coins). It's affordably priced at £42/ $59, with free world-wide shipping and customer support
 **Port Blockers**<br>[![__](https://i.ibb.co/fYPVnK5/6.jpg)](https://amzn.to/327Yn9n) | There are many attacks that involve an attacker inserting a USB device (such as a BadUSB/ Rubber Ducky/ Malduino) to an open USB port. Adding a port blocker doesn't render you safe from this, since the attacker could take the time to try and remove it, but it could protect you for an opportunistic attack
 **Privacy Filter**<br>[![__](https://i.ibb.co/KjkTbGN/7.jpg)](https://amzn.to/3bAa9xv) | Privacy filters are polarized sheets of plastic, that when placed over a computer screen prevent screen visibility from any angle other than straight on. They make it harder for anyone to look over your shoulder and see your data confidential
 **YubiKey**<br>[![__](https://i.ibb.co/PGtbwxN/8.jpg)](https://amzn.to/38wcG9R) | The YubiKey is a small hardware device used to secure access on mobile devices, computers, and servers to all of your online accounts. It allows for second-factor authentication, hence protecting anyone other than you from logging in. It is said to be more convenient and more secure than using a mobile authenticator, but there are reasons for and against
@@ -245,7 +246,8 @@ You can also build your own key, see [U2f-Zero](https://github.com/conorpp/u2f-z
 The most secure medium to store your currency is cold (offline) wallets, since they cannot be hacked. Of course it is vital that you keep your private keys somewhere that they cannot be stolen, and cannot be lost or destroyed. Electronic devices can make it easy to securely store and spend crypto currency. Choose a wallet that is open source, and with a good reputation. Ensure you backup your seed, and keep it somewhere safe.
 
 - Trezor is fully open source and implements a firmware-based security on top of known hardware. [Trezor.com](https://trezor.io)
-- Ledger takes a more black box approach, but their devices are very well tested and secure. They are also easy to use and durable, with good support for a range of crypto. [Ledger.com](https://shop.ledger.com/pages/hardware-wallets-comparison)
+- Prokey Optimum is a secure, easy-to-use offline wallet, that works directly through the browser (on Windows, Mac, Linux and Android), without the need for installing any apps. Both the firmware and browser app is [open source](https://github.com/prokey-io), and it natively supports [over 1000 coins and tokens](https://prokey.io/all-coins). It's affordably priced at £42/ $59, with free world-wide shipping and customer support. [Prokey.io](https://prokey.io/?reflink=67e4a39bc5cd4c04bd7f38b50b041c1f)
+- Ledger is a popular option, as both their hardware and software are good quality, easy to use, and feature rich, however it is not open source. [Ledger.com](https://shop.ledger.com/pages/hardware-wallets-comparison)
 - Indestructible Steel Wallet, for private key. [US](https://amzn.to/2Px0EFV) | [UK](https://amzn.to/2VLeVmr)
 - QUANTUM is a Multifunctional crypto device, that is an open source secure, reliable and simple cross-platform cryptocurrency wallet and password manager. [crypto-arts.com](https://security-arts.com/) | [Tindie](https://www.tindie.com/products/security-arts/quantum-multifunctional-crypto-device/)