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Ask the Expert: Sheraz Arshad

Another day, another #AskTheExpert!

This week we’re dishing out a treat with an insight into a day-in-the-life of Sheraz Arshad, CertiK Security Engineer, and all-around ace guy.

Like all of our team members, Sheraz plays an essential role in the CertiK ecosystem and, by default, the security of the entire blockchain ecosystem.

Q: Why did you want to become a security engineer?

I have always had a fascination with computers since I started using them as a kid. As a teen, I liked interacting with people all over the world on Yahoo chat rooms and there I was introduced to…


Transaction Operations for a Common Token Transfer

When it comes to Ethereum, the first thing that comes to mind may well be “gas fee”. Nowadays, the mainnet of major blockchain projects are online, and their synonyms for ‘transaction fees’ are often inseparable from the word “gas”.

The high gas fee has always been a sore point for blockchain transactions, especially for smaller scale investors. With the increase of blockchain projects and the expansion of the market, the number of transactions on the blockchain and the average gas consumption of transactions has increased.

Here we can insert some historical data of Gas price

Recently, with the ups and…


Navigating a CertiK Security Audit

The first time you check out a crypto security audit on the CertiK Security Leaderboard you might find the report a little daunting, confusing, and a little more like hieroglyphics than an essential asset to DYOR.

Whether it’s a security audit report of your favorite ERC20, an intricate and robust DeFi audit, or you’re looking into the security of your go-to NFT platform, we’re here to help you navigate any CertiK audit like a champ.

What is a CertiK Audit?

A security audit is an objective review of a particular codebase, or smart contract. The goal is to identify security vulnerabilities, alongside potential optimizations in…


The hacker/s used fake credentials at the front desk, gaining the trust of the receptionist; the receptionist then handed over the keys to the vault.

Incident Description

On Aug 10, 2021, PolyNetwork suffered a cross-chain attack that resulted in a total loss of $600M. The attacker created various malicious transactions on multiple chains and used the Relayer component to orchestrate the entire hack.

Using the vault example above, the hacker/s used fake credentials (invalid transaction on the Side Chain) to get a real key (signed Merkle certificate on the Alliance Chain) from the front desk receptionist (Relayer).

This report presents the full…


Ask the Expert: Sheraz Arshad

Another day, another #AskTheExpert!

This week we’re dishing out a treat with an insight into a day-in-the-life of Sheraz Arshad, CertiK Security Engineer, and all-around ace guy.

Like all of our team members, Sheraz plays an essential role in the CertiK ecosystem and, by default, the security of the entire blockchain ecosystem.

Q: Why did you want to become a security engineer?

I have always had a fascination with computers since I started using them as a kid. As a teen, I liked interacting with people all over the world on Yahoo chat rooms and there I was introduced to…


‘Transaction Operations for a Common Token Transfer

When it comes to Ethereum, the first thing that comes to mind may well be “gas fee”. Nowadays, the mainnet of major blockchain projects are online, and their synonyms for ‘transaction fees’ are often inseparable from the word “gas”.

The high gas fee has always been a sore point for blockchain transactions, especially for smaller scale investors. With the increase of blockchain projects and the expansion of the market, the number of transactions on the blockchain and the average gas consumption of transactions has increased.

Here we can insert some historical data of Gas price

Recently, with the ups and…


Ask the Expert: Xinyuan Sun

The CertiK Team is truly international. With a team which reflects the decentralised nature of a blockchain itself, we’re able to achieve incredible results when it comes to innovation in the blockchain security space.

Not least because of people like Xinyuan, the latest team member in our Ask the Expert series.

Without further ado, take it away Xinyuan!

Q: Could you introduce yourself? How did you start your career?

My name is Xinyuan Sun, from Nanjing, China. I currently live in New York, USA. I joined CertiK a year ago. I have a dual degree in philosophy and computer science…


On the 22nd of June we invited our community to fire questions to the CertiK team and the great folk at SeedifyFund. The response was amazing, and we had a blast answering your questions!

From audits and security education, to the long term vision and mission of SeedifyFund.

Without further ado, let’s kick it off with an introduction from the team at Seedify before we launch in their AMA!

Q: Can you give us an overview of yourself and the project?

Hi, I am Levent Cem Aydan, founder of Seedify.fund. I have been an entrepreneur for about 10 years…


In his early days, Minzhi never thought he’d become a Security Engineer for the largest crypto and blockchain security company in the world. With a background in software engineering, and a desire for DeFi, Minzhi has built upon his skillset to become a Security Engineer with CertiK!

Below, Minzhi shares a day in the life, alongside his background, interests, and more.

Who are you? How did you start your career?

I am Minzhi He. I joined Certik in March 2020. I majored in cybersecurity, and I first got exposed to blockchain technology in one of my Masters courses. …


Adrian is a self-confessed technology nerd and geek. From owning the Amiga 500 in his childhood, Adrian always loved computers and the potential of what you could do with them.

He developed his curiosity and hacker-mindset through playing video games and teaching himself how to hack or root devices he owned, from various game consoles through to iPods and smartphones (even before they were ‘smart’, too!).

Adrian’s journey into Blockchain started in 2016 where he worked on de-anonymizing Bitcoin transactions as part of the Innovation Exchange programme at BAE Systems. …

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Official Website: https://certik.io

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