Recently I learned about a second cold storage technology, the seed phrase stored on a credit card-like card making use of NFC to 'talk' with a smartphone wallet. Companies such as Arculus and Tangem offer such wallets. Like most of us, I knew about the technology used by Trezor and Ledger, based on hardware with its own wallet on said hardware.
From UX point of view, I really like the credit card-like seed phrase storage with the smartphone app. Though am wondering if this technology is at least as secure as a Trezor/Ledger wallet. Thus far I wasn't able to find an independent review between such technologies and cold storage wallets. Obviously, Arculus and Tangem claim they have better technology than Trezor and Ledger. But is this true?
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