セキュリティ on Mainnet.jp

Types of Crypto Wallets and How to Choose: Beginner's Guide 2026

Wed, 08 Jul 2026 10:00:00 +0900

Holding cryptocurrency requires more than leaving funds on an exchange. Setting up your own wallet is strongly recommended. However, with many wallet types available, beginners can feel overwhelmed. This guide explains the major wallet types and how to choose one in 2026.

Hot Wallets vs. Cold Wallets

Wallets fall into two broad categories: hot wallets (always connected to the internet) and cold wallets (managed offline).

Hot wallets come as smartphone apps or browser extensions, convenient for transfers and DeFi use. Cold wallets are hardware devices or paper-based, offering superior security but requiring more effort for transactions.

2026 Guide: How to Choose a Crypto Exchange and Stay Secure

Mon, 29 Jun 2026 14:00:00 +0900

Choosing the right crypto exchange is the first major decision every crypto investor faces. As of 2026, Japan has over 20 registered exchanges, each with distinct features. This guide explains how to evaluate exchanges and what security measures you should take as a user.

Exchange Evaluation Criteria

Check Registration

Always verify that the exchange is registered with Japan’s Financial Services Agency (FSA). Operating a crypto exchange without registration is illegal in Japan, and unregistered platforms pose extreme risks. The FSA publishes an updated list of registered operators on its website.

Anti-Hacking: How to Use Exchange vs. Hardware Wallets

Sun, 07 Jun 2026 13:15:00 +0900

Because cryptocurrencies are digital assets, they are highly targeted by hackers. Protecting your assets requires understanding the security architecture of exchanges and hardware wallets. We share our guide to self-custody.

The Risks of Keeping Assets on Exchanges (Hot Wallets)

Leaving your crypto inside your exchange account means the exchange controls your private keys (the signature authorizing withdrawals).

Risks: If the exchange gets hacked or faces insolvency, your funds may be frozen or stolen.

What is a Hardware Wallet? (Cold Custody)

A physical USB-like device that manages your private keys completely isolated from the internet (e.g. Ledger, Trezor).

Steps and Precautions to Earn Free Tokens via Airdrops

Mon, 12 Jan 2026 14:35:00 +0900

Web3 projects often reward early users by distributing free tokens via “Airdrops.” While highly lucrative, often yielding thousands of dollars, the field is rife with malicious actors. We outline the mechanics and safety rules.

Why Projects Host Airdrops

Early projects launch token rewards to:

Reward early beta testers and boost app engagement metric targets.
Distribute governance tokens to community nodes, completing the shift to a DAO.

Standard Engagement Tasks

Testing Betas: Connecting wallets to trial early software features.
Liquidity Provision: Staking assets in pools to help establish asset depth.
Social Marketing Tasks: Submitting verification logs after joining community channels.

Crucial Airdrop Scam Countermeasures

Beware of fake Twitter accounts announcing “Airdrop Claim is Live!” Connecting MetaMask to fake sites prompts signature calls that steal all your tokens. Rely strictly on links posted inside verified official Discord channels.

Checklist to Measure the Security Standards of Crypto Exchanges

Thu, 01 Jan 2026 13:30:00 +0900

When selecting a cryptocurrency exchange, security must take priority over low fees. In past cycles, exchange hacks have wiped out customer holdings. We share a checklist to evaluate exchange safety levels.

5 Security Checkpoints for Exchanges

1. Percentage of Assets in Cold Custody

How much of customer assets are kept offline? Exchanges regulated by Japan’s FSA are legally mandated to keep near 100% of customer deposits in cold storage.

2. Multi-Signature (Multi-Sig) Support

Does moving funds require multiple signatures from separate authority keys? This stops thieves from draining funds if a single key is leaked.