We believe that the most secure mobile crypto wallet is one that overcomes the inherent constraints of its mobile operating system. For instance, on iOS, Apple’s CryptoKit doesn’t support the secp256k1 elliptic curve, a standard for Bitcoin, Ethereum and many other blockchains.

This limitation restricts developers from utilizing the secure element of devices for key storage and transaction signing. As a result, mobile crypto wallets are classified as hot wallets since they are both connected to the internet and sign transactions outside of a secure element using a software implementation of the cryptographic algorithms.

This means that the private keys must be exposed – at least during signing – within the memory of the sandboxed app environment. This leaves them more exposed to potential threats than a wallet which uses a secure element to sign transactions.

Despite the inability to perform the signing on the secure elements directly, which would

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