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Amber Group
Amber Group

2.1K Followers

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Jan 6

Hardening Blockchain Infrastructure with Papora

In the past three years, we have witnessed hundreds of blockchain hacks resulting in losses of billions of dollars. Although many of them are related to smart contracts, the underlying blockchain client software is the crucial component to the achievement of consensus and the protection of the network. According to…

9 min read

Hardening Blockchain Infrastructure with Papora
Hardening Blockchain Infrastructure with Papora

9 min read


Dec 26, 2022

MOVEment CTF 2022 Writeup

The CTF MOVEment is a major Move security competition for security professionals and developers who are interested in the Move language and the Move ecosystem. Sponsored by Aptos Foundation and hosted by MoveBit on 10–12 December, the CTF consisted of 5 challenges and attracted a total of 102 participants around…

9 min read

MOVEment CTF 2022 Writeup
MOVEment CTF 2022 Writeup

9 min read


Dec 20, 2022

Mai Finance’s Oracle Manipulation Vulnerability Explained

On Oct 18th 2022, the blockchain security team at Amber Group discovered a critical vulnerability in two Mai Finance’s vaults (SCSEMVT and YCSEMVT). This vulnerability would allow an attacker to manipulate the collateral price, borrow all the funds from the pool, and walk away with bad debts. We reported the…

5 min read

Mai Finance’s Oracle Manipulation Vulnerability Explained
Mai Finance’s Oracle Manipulation Vulnerability Explained

5 min read


Published in Amber Group

·Nov 15, 2022

MoveCTF 2022 Writeup

The MoveCTF is a major Move security competition for security professionals and developers who are interested in the Move language and the Move ecosystem. Sponsored by Sui Foundation and hosted by MoveBit on 5–7 November, the first MoveCTF consisted of four challenges and attracted a total of 345 participants around…

Move

9 min read

MoveCTF 2022 Writeup
MoveCTF 2022 Writeup
Move

9 min read


Published in Amber Group

·Nov 1, 2022

Extractable Value

Introduction In the early 1800s, the five sons of Mayer Rothschild branched out from their base in Frankfurt, establishing branches in London, Paris, Vienna, and Naples. They built out an information network, using carrier pigeons, couriers, and chartered boats to shuttle information across Europe faster than anyone else. Through this network…

Ethereum

27 min read

Extractable Value
Extractable Value
Ethereum

27 min read


Published in Amber Group

·Oct 12, 2022

Demystifying The Landscape of DAG-based Architecture

Introduction Over the past decade, blockchains have risen to become the leading form of distributed ledger technology. Despite their current dominance, however, a growing number of projects are proposing alternative solutions to solve certain scalability issues inherent to blockchains. One of these proposed technologies is the DAG, or Directed Acyclic Graph…

Blockchain

20 min read

Demystifying The Landscape of DAG-based Architecture
Demystifying The Landscape of DAG-based Architecture
Blockchain

20 min read


Published in Amber Group

·Sep 30, 2022

Exploiting the Profanity Flaw

On 20 Sep 2022, a tweet indicated that Wintermute had been hacked for ~$160M . One day after, in a follow-up tweet, the victim stated that the attack was linked to Profanity-type exploit. After some preliminary research, we were able to see that the victim’s EOA account 0x0000000fe6a514a32abdcdfcc076c85243de899b was compromised…

Exploit

10 min read

Exploiting the Profanity Flaw
Exploiting the Profanity Flaw
Exploit

10 min read


Published in Amber Group

·Sep 13, 2022

Built for Speed: Under the Hoods of Aptos and Sui

Introduction Over the past two years, there has been an explosion of new smart-contract-enabled distributed ledgers which aim to address the perceived shortcomings of Bitcoin and Ethereum. These “alt layer 1s,” or “alt L1s,” as they’re commonly referred to, typically offer new architectures and make different design trade-offs to increase the…

Aptos

20 min read

Built for Speed: Under the Hoods of Aptos and Sui
Built for Speed: Under the Hoods of Aptos and Sui
Aptos

20 min read


Published in Amber Group

·Sep 8, 2022

Web3 Hacking: Paradigm CTF 2022 Writeup

Paradigm CTF is one of the most challenging Web3-focused security competitions — amazing for blockchain security folks, this competition consists of challenges created by some of the brightest minds in the field. The blockchain security team at Amber Group participated as team Amber_Labs and ranked #6 from a total of…

Blockchain Security

18 min read

Web3 Hacking: Paradigm CTF 2022 Writeup
Web3 Hacking: Paradigm CTF 2022 Writeup
Blockchain Security

18 min read


Published in Amber Group

·Sep 5, 2022

Need for Speed: Zero Knowledge

1. Introduction Zero-knowledge proofs allow one party to prove to another party that a given statement is true without revealing any additional information. Naturally it could be leveraged to protect privacy, proving some transactions are valid while hiding all the details. Another important property of certain ZK protocols — such as STARKs…

Zero Knowledge Proofs

20 min read

Need for Speed: Zero Knowledge
Need for Speed: Zero Knowledge
Zero Knowledge Proofs

20 min read

Amber Group

Amber Group

2.1K Followers

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