16 Websites

When dealing with cryptocurrencies like

It is important to understand both the technical fundamentals and the financial risks of Bitcoin or Ethereum. Here are the key points you should know:

  • Technology & Decentralization:

    • Cryptocurrencies are based on blockchain technology, a decentralized network that securely stores transactions in data blocks.

    • They operate independently of central banks or governments.

  • Security & Custody:

    • Your digital assets are stored in a wallet. Protect your access credentials (private keys) very well, as there is often no recovery option in case of loss.

    • Do not use wallets on smartphones or PCs for large amounts; instead, use secure 'cold wallets' (offline storage).

    • Regularly create backups of your wallet.

  • Risks & volatility:

    • Cryptocurrencies are highly speculative. Price fluctuations can be extreme, which means both high profit potential and the risk of total loss.

    • Beginners should focus more on established currencies like Bitcoin (BTC) or Ethereum (ETH) since they have higher market capitalization and stability than unknown 'altcoins.'

  • Trading & platforms:

    • The purchase is made through cryptocurrency exchanges like Coinbase, Binance, or Bitpanda.

    • Alternatively, brokers like Trade Republic or Swissquote also offer trading in cryptocurrencies.

  • Legal & taxes:

    • Profits from cryptocurrency transactions are generally taxable and must be reported in your tax declaration.

    • The tax office can learn about your profits through blockchain analyses or inquiries to exchanges.

      Julius Baer +13

Do you already have a specific wallet in mind or want to know how to securely acquire your first coins?

15 Websites

The 'Signing' (or

Signing is one of the most critical moments in dealing with cryptocurrencies. It is your digital signature that irrevocably authorizes an action.

Here is the most important thing you need to know about it:

1. What happens when signing?

When you click 'Sign' or 'Confirm' in your wallet, the software uses your private key to create a mathematical proof.

SettleMint +1

  • The proof: It shows the network that you are the legitimate owner of the coins without having to disclose your secret private key.

  • The security: A signature is only valid for a very specific message or transaction. It cannot be reused for another transfer.

2. Signing transaction vs. message

There are two main types of signing:

  • On-Chain (transaction): You authorize the sending of values (e.g., send 0.1 BTC). This is recorded on the blockchain and incurs network fees ('gas').

  • Off-Chain (message/login): You sign a text to prove your identity with an app or to log in. This does not occur on the blockchain and usually incurs no fees.

    Binance +2

3. The biggest danger: Blind Signing

Many users sign requests from websites without being able to read them (often just a long code of numbers and letters).

  • The risk: Scammers can present you with an innocent message that is actually an 'Approval' function. This gives the attacker permission to withdraw your entire balance from your wallet.

  • The solution: Use hardware wallets like Ledger or Trezor that support 'Clear Signing.' This displays in plain text on the device's secure screen what you are currently signing (e.g., 'Send 5 ETH to address XY').

    Ledger +4

Rule of thumb for security

Never sign a request if you do not fully understand what it does. Once signed, a transaction on the blockchain cannot be undone.

21bitcoin +1

Did you receive a specific request in your wallet that you are unsure whether to sign?

When Binance encounters the term 'Sign' (signing), it can mean two completely different things. It is important to distinguish whether it is about a security action in your wallet or the crypto project called 'Sign.'

1. The project 'Sign' (TOKEN: $SIGN)

Binance has integrated the crypto project Sign (SIGN) into its ecosystem (e.g., via HODLer airdrops in April 2025).

Binance +1

  • What it is: A protocol for 'Omni-chain Attestations.' It serves to verify identities, ownership, or contracts digitally on the blockchain without disclosing private data.

  • Token utility: The $SIGN token is used for network fees, staking, and governance within this protocol.

  • Trading: You can trade $SIGN on the Binance spot market or acquire it via the Binance Web3 wallet.

    Binance +4

2. The 'Sign' feature in the Binance wallet

This refers to the technical process of signing a transaction or message.

  • Signing transactions: Every action in your Web3 wallet (e.g., sending or exchanging coins) must be signed. This cryptographically proves that you are the owner.

  • Secure Auto Sign (SAS): Binance offers a feature called 'Secure Auto Sign.' This allows certain transactions (e.g., limit orders in the DEX) to be signed automatically and quickly without having to confirm each action manually on your phone. Your keys remain secure in a protected area (TEE).

  • Security warning: Binance blocks risky signature methods (like eth_sign) to protect you from phishing, where scammers attempt to gain full access to your wallet.

    Binance +4

3. Security when signing on Binance

  • Always check the content: Before you click 'Sign' in the wallet, read the details. Scammers often use fake airdrops to lure you into signing a malicious message.

  • DApp connection: Only sign requests from websites whose URL you have verified.

    Binance +2

Do you want to know how to activate automatic signing (SAS), or are you interested in purchasing the $SIGN token?

Web3 Wallet Security: The Risks of Signing Blockchain Messages

Binance

What Is Sign (SIGN)? - Binance

Binance

Introducing Sign (SIGN) on Binance HODLer Airdrops! Earn SIGN With ...