Web3 Security

One-Line Explanation

Web3 Security = Protecting Your Digital Assets

In Web3, you are your own bank. This means both freedom and responsibility.

The Golden Rules

🔐 Rule #1: Protect Your Keys

Your private key = Your funds

If someone has your private key or seed phrase:
- They can access ALL your funds
- Transactions are irreversible
- No customer service to help

NEVER share your:
- Private keys
- Seed phrases (12-24 words)
- Wallet passwords

🛡️ Rule #2: Verify Everything

Before ANY transaction:

✅ Check the website URL
   - Typo squatting is common
   - Use bookmarks for important sites

✅ Verify contract addresses
   - Check on block explorer
   - Compare with official sources

✅ Understand what you're signing
   - Read transaction details
   - Check amounts and recipients

⚠️ Rule #3: Start Small

New to DeFi?

1. Start with small amounts
   - Test the full process
   - Verify everything works

2. Learn the basics first
   - Understand how transactions work
   - Know what gas fees are

3. Build up gradually
   - Increase amounts as you gain experience
   - Never invest more than you can lose

Common Scams

🎣 Phishing

How it works:
- Fake emails/messages pretending to be official
- Malicious links to steal credentials
- Fake websites that look real

Prevention:
- Never click links in emails
- Always type URLs manually
- Use browser bookmarks
- Verify sender identity

💸 Rug Pulls

How it works:
- Developers create token/project
- Attract investors with promises
- Abandon project and steal funds

Prevention:
- Check team identity
- Look for code audits
- Analyze tokenomics
- Be wary of anonymous teams

🎁 Airdrop Scams

How it works:
- Receive "free" tokens
- Visit website to claim
- Approve malicious contract
- Lose your funds

Prevention:
- Legitimate airdrops don't need approval
- Never approve unknown contracts
- Research before interacting

🤖 Impersonation Scams

How it works:
- Scammers pretend to be support/influencers
- Offer "help" or "opportunities"
- Trick you into sharing keys or sending funds

Prevention:
- Official support never DMs first
- Check official social media
- Never share sensitive info

Wallet Security Best Practices

🏠 Hot vs Cold Wallets

Hot Wallet (MetaMask, etc.):
- Connected to internet
- Convenient for daily use
- Smaller amounts only

Cold Wallet (Ledger, Trezor, etc.):
- Offline storage
- Maximum security
- For large holdings

📋 Recommended Setup

1. Main wallet (cold)
   - Hardware wallet
   - Majority of funds
   - Address for long-term storage

2. Daily wallet (hot)
   - Small amounts for daily use
   - Regular rotation
   - If compromised, limited loss

🔐 Security Checklist

✅ Hardware wallet for >$1000
✅ Seed phrase written down, stored securely
✅ Seed phrase NOT stored digitally
✅ Multiple device backups
✅ Never shared seed phrase with anyone
✅ Verified all contract addresses
✅ Understood all transactions before signing
✅ Started with small amounts
✅ Regular security reviews

DeFi Security

Before Using a Protocol

1. Check the team
   - Who is behind it?
   - Are they doxxed?
   - Track record?

2. Review the code
   - Audited by reputable firm?
   - Open source?
   - Bug bounty program?

3. Analyze tokenomics
   - Token distribution?
   - Vesting schedule?
   - Inflation rate?

4. Check track record
   - Time in market?
   - Any incidents?
   - Community trust?

Transaction Safety

Before confirming any transaction:

□ Correct website URL
□ Correct network (ETH/BSC/etc.)
□ Correct recipient address
□ Correct token
□ Reasonable amount
□ Reasonable gas fee

Use transaction preview tools:
- Etherscan shows details
- MetaMask shows simulation

Managing Permissions

Many DeFi apps require approvals:

Good practice:
- Approve only what's needed
- Revoke unused approvals regularly

Tools to manage approvals:
- approved.zone
- revoke.cash
- Etherscan token approval checker

PulsePay Security Features

✅ CertiK Security Audit
   Third-party code review

✅ Transparent Operations
   All on-chain verifiable

✅ Multi-sig Controls
   Team fund protection

✅ Timelock Mechanism
   Key operations delayed

✅ Progressive Decentralization
   Gradual trust-building

💡 Stay Safe

When in doubt, don't proceed. It's better to miss an opportunity than to lose funds.

Emergency Response

If Your Wallet is Compromised

1. Act FAST
   - Disconnect wallet
   - Transfer remaining funds to safe address
   - If hardware wallet, reset it

2. Identify the cause
   - Check transaction history
   - Review recent approvals

3. Report
   - Contact project support
   - File report with authorities
   - Warn community

If You Sent to Wrong Address

Reality check:
- Blockchain transactions are irreversible
- No central authority to reverse

Possible actions:
- Contact recipient (if known)
- Accept the loss
- Learn for future

Resources

Resource	Use
Etherscan	Verify contracts, transactions
DeBank	Track portfolio, approvals
Revoke.cash	Manage token approvals
RugDoc	Project risk analysis
CoinMarketCap	Verify tokens, prices

Next Steps

• Smart Contract Principles — Understand the underlying code
• DeFi Deep Dive — Learn DeFi safely
• PulsePay Get Started — Experience secure DeFi