Internet of Money by Andreas Antonopoulos

September 23, 2018

I finished listening to an audio version of the book called “The Internet of Money” by Andreas Antonopoulos. This book is structured into very short, numbered talks which are quite handy when you need to navigate elsewhere and also if you need a refresher. Each chapter starts with a title that makes it really easy to remind yourself whether you’ve listened to it or not. Great for a distanced driving.

In regards to the content of the book, as you would assume, it relates to Bitcoin technology and refers to it all throughout the book. There are quite good examples and is easy to understand. Here are a few points that stood in my mind after finishing this book (version 1).

Now I can jump on the second edition and will update this post after finishing it.

 

Also, I would like to thank Andreas and other people that spend their valuable time working on this piece. I provide a link here, so this book can reach a wider audience. I hope you will enjoy it as I did.

https://www.audible.com.au/pd/The-Internet-of-Money-Audiobook/B071RPBKL1

CRYPTO: Ledger Nano S

May 30, 2018

If you have some crypto coins, secure them in hardware wallet! I can recommend Ledger Nano S as shown below. I used it for about 3 months, pretty straightforward to use, portable and reasonably priced. If you have any questions, leave me a message.

Ledger Nano S - The secure hardware wallet

 

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CRYPTO: Crowdfunding Project

Acorn Collective

Acorn Collective

Crowdfunding is a great tool, yet platforms that dominate the market at moment are taking a big bite for securing those transactions. Here is just an example chart of how much you end up paying read more …

Wave Apps – online invoicing switch

April 30, 2018

As of 1st May 2018, I will be utilising WaveApps.com and moving away from FreshBooks for invoicing and accounting purposes. They both provide similar features and Credit Cards integration with Stripe payment platform, but WaveApps takes it to the next level with zero monthly cost. This package is, however, designed for small businesses and there can be issues with GST calculations on invoices as this product primarily targets the US market. For non-GST-registered individuals, it is a great and free tool. Tools like MYOB Essentials, XERO, Quickbooks have been taken into consideration, but I do not see a value for money (with respect to my current needs). Let me know your experience with this or similar product.

SECURITY: TPG modem admin bypass to enable DSL

February 12, 2018

Problem:

you have Huawei HG659 that came from TPG pre-configured, but it doesn’t work on ADSL. You set up bridge mode to 3rd party ADSL modem and still no success. Reason being – it’s preconfigured for VDSL and you cannot change it without root admin access. On top, TPG won’t give you the password for root.

Solution:

Forget about root admin read more …

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CRYPTO: Bitcoin is not always Bitcoin!

February 9, 2018

Bitcoin is not always Bitcoin!

Warning! Before you invest in Bitcoin, please do a proper research and/or ask people you trust for advice in this field. There is a very nasty marketing approach circling Bitcoin and has been for a while, as everyone wants to cut their piece and profit. Don’t let them profit on you.

You might come across websites, social network profiles or forum campaigns, which claim that they sell or offer services of Bitcoin, but they are actually selling a forked version of Bitcoin. read more …

WEB: webserver sizing and testing

February 7, 2018

Here are few links I recommend to start with for a web server design, load testing and performance.

  1. Web server sizing – network, processor, memory, HDD
    http://www.dell.com/content/topics/global.aspx/power/en/ps3q01_graham?c=us&l=en&cs=04
  2. Load testing – load impact – nice tool to put a web under (test)load 🙂
    https://loadimpact.com
    http://support.loadimpact.com/knowledgebase/articles/174121-how-do-i-interpret-test-results

CRYPTO: handy BTC tools for TXs and fees

Below is a list of tools you might need for checking a transaction fee or its details. Handy for cutting some TXs cost and troubleshooting crypto transactions (mostly BTC).

  1. Unconfirmed transaction and fees estimator; shows price per byte and eta for confirmation
    https://bitcoinfees.earn.com
  2. Unconfirmed transactions in mem-pool, variation of #1
    https://dedi.jochen-hoenicke.de/queue/
  3. Bitcoin Fee calculator, calculate size and fee estimation
    https://coinb.in/#fees
  4. Accelerators – for stuck transactions
    ConfirmTX – free below 300bytes, larger $5
    ViaBTC’s accelerator – free, 100 txs, starts every hour, FIFO
    Coolwave accelerator – forum, register first (bitcoinTalk forum)
  5. Block explorer – review transaction details and info about network
    Blockchain.info – info + wallet (BTC)
    Blockr.io – BTC/LTC info
    Blockexplorer.com – grandpa explorer
    Insight.is  – API tool for data
    Chain.so – multi-currency block explorer
    Blocktrail – explorer and wallet
    BitcoinChain – explorer and other info

CRYPTO: GDAX – CoinBase security flaw

January 23, 2018

Let’s assume you enabled 2FA on your GDAX/Coinbase account. Currently, you cannot withdraw funds from GDAX to outside address or bank account without two-factor authentication (2FA).

However, you can move the funds from GDAX to Coinbase account and from there you can then send them to outside address without 2FA! I consider this a security flaw and will demonstrate the issue in the example below.

If for example, you have a device (PC/MAC/Mobile, etc.) where you have activated “remember me for 30 days” feature to avoid providing 2FA everytime you log in, this device becomes a target for potential theft. Once someone will get an access to this device and steal your login credentials, they can then move the funds from GDAX to Coinbase and from there move it to an outside address to which you no longer have access. GDAX and Coinbase share the security settings (including login details), so attacker needs just your login details to access both platforms to action it.

Vulnerability above assumes that attacker will gain access to login credentials and to the device with active “remember me for 30 days”, so please make sure you have both secured very well if you happen to have this kind of set up.

@COINBASE: kindly fix it pls!

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How to make public facebook posts private (the quicker way)

January 2, 2018

I randomly came across a problem related to Facebook privacy and public posts. If you have ever posted something on Facebook, you might also know that there are some privacy options available for each post. While you might have your default visibility set up to “friends” only, there still might be some older posts on your timeline with privacy set to “public“.

That essentially means that anyone who googles your profile can see your public posts, such as links, photos, videos, notes etc. Remember those pictures with your awesome hairstyle from the 80’s? Your dance creations on New Year’s Eve? Or maybe those links about political affairs? Whatever is the case, you might feel like you want to hide them all. read more …

Short forecast of computing era in relation to AI

September 15, 2016

AI = artificial intelligence, has been on rapid growth during the millennium age and we are shifting into cognitive era of computing, where computer software can listen, learn and analyse unstructured data. Cognitive thinking is natural to humans but it’s been a great challenge for digital world. These limitations however, are falling apart and the future we envision and sometimes dream about, might be closer than we think. Scary and exciting at the same time. read more …

iPhone wifi issue solved by hair dryer

May 5, 2015

Ok. So this has happened to me already 4 times and technique below is not guaranteed at any circumstances. However, it worked for me all the time. So what is the issue? iPhone 4s simply stop providing me wifi feature since I updated the iOS to newer version. It has happened with any major iOS update 7.x, 8.x. Wifi was working perfectly fine, then I updated iOS and boom – wifi button grayed out. Soft reset, hard reset, factory restore, nothing helps. Apple support claiming it as a hardware fault. read more …

Password security

February 4, 2015

I am currently working on revision of my password management. Recently, I’ve been a victim of a scam e-mail from pretending to be from Gumtree and my password was exposed. Rookie mistake in a rush. I immediately took actions, however I realised, I don’t have a clear idea, where else have I used that password and hence those services is under potential threat. read more …