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1. DApps: Security Issues, Hacks, and
Preventive Measures
Cyphershield.tech

2. Decentralization is the new norm for the next period in all spheres of life. DApps are here to
transform how we use applications by fusing ownership and data privacy features.
Describe DApps
● Decentralized app audit services, or DApps, employ blockchain technology to handle
data over a distributed network and carry out transactions. DApps, in contrast to
centralised apps, are run through peer-to-peer networks.
● A number of applications may be constructed on top of the DApp source after the
developer releases it.
● Since the P2P network manages them, there is no single authority and hence no single
point of failure.
● DApp helps create numerous applications such as web applications, games &
entertainment, social media apps, etc.

3. Important DApp Characteristics
● Here are some tips on the main characteristics of DApps.
● They have user-controlled open-source code. Thus, all modifications or new inclusions are
put to a vote before being enacted.
● The fundamental principle by which all the information is stored in the open distributed
ledger is decentralisation.
● Tokens that are native to the platform are used by DApps to pay users for participating in
or mining them.
Use of DApps news
DAppRadar claims that there are already 2.4 million users of Blockchain dapp auditing
company, with that figure increasing by 396% annually.

4. Issues with DApp Coding Security
● Now that you are familiar with the general concept of DApps, let’s look at some of the
frequent technical mistakes related to them.
● Signature verification: The transfer transaction is forbidden when the check format “case
=> true” is used in the @verifier function of the DApp code, while other transaction types
are permitted.
{-# STDLIB_VERSION 3 #-}
{-# CONTENT_TYPE EXPRESSION #-}
{-# SCRIPT_TYPE ACCOUNT #-}
match (tx) {
case t:TransferTransaction => false
case _ => true # NEVER DO THIS!

5. To avoid the aforementioned vulnerability, it is essential to guarantee the inclusion of a signature
check in the DApp code.
Entering keys: The key-value store is a component of the DApp’s activities. Developers
frequently make the error of writing to one key and reading from another. Therefore, caution
should be used when writing keys.
General DApps-Related Concerns
● Low liquidity of DApps: Slippage occurs when it is impossible to purchase or sell tokens at
the anticipated price due to low liquidity levels on decentralised apps. Slippage, which can
result in a loss of cash, is the discrepancy between the predicted and executed pricing.
Security failure or breach: Security Audit for dApp use smart contracts to work, and those
with code vulnerabilities are excellent targets for hackers. Devaluation or money loss in DApps is
unavoidable in severe market conditions or as a result of code attacks.
DApp phishing: If the DApp’s coding is compromised, phishing URLs are disseminated on its
official websites. They empty the user wallets of all their money when clicked inadvertently.

6. Here’s How To Stay Secure And Preventive Methods To Adopt For DApp Security
For DApps, overcoming security issues is the main obstacle to be overcome. There are several options
for organising it.
Engage in auditing activities: In-depth coding examination performed by an auditing company like
Cyphershield Audits removes flaws at their source.
General Preventive Measures For DApp Security
● Maintain the secrecy of the private seed phrase to access the funds from the wallet
● Verifying the authenticity and legitimacy of the DApp website
● Be wary of links or texts with grammatical errors.