6.
No. All wallets differ by online and offline types, and the security mechanisms differ respectively.
The majority of existing online cloud wallets, or so called ‘hot’ wallets, use two-factor authentication, in case hackers try to enter your email. ‘Warm’ wallets, the ones that you install as a software to your computer, or as an app to you smartphone, use 12-word backup phrase and pin-codes. ‘Cold’ wallets are hardware ones, that are located at a USB stick or a special gadget — it seems like the most secure way so far, but, according to a recent report, even hardware wallets are not foolproof. Regular updates and careful key management are still vitally important. Whatever kind of wallet you use, you should make sure that your laptop or smartphone doesn’t contain malware.
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