Hi There,
I use passphrase to get extra protection for my assets, and I always type the passphrases on the Trezor device for security reasons, as the computer could have a key logger or any other type of malware, and I want to be sure my passphrase cannot be stolen by an attacker.
I have noticed Trezor Safe 7 wallets behave differently when we enter a passphrase. On older models such as Trezor Safe 5 we could see the passphrase in clear text on the screen. But with the new Trezor Safe 7 it only shows the latest character we have entered. All previous characters are automatically replaced with a star. Presumably this is to prevent someone else in the same place from being able to see my passphrase on my screen. But I think this behaviour is actually very dangerous. We have to acknowledge that typing text on a small screen is very error prone. We have to press on the same button multiple times to get the character we want. This often leads to mistakes.
I am very concerned about the risk of mis-typing the passphrase when we create new wallets on the Trezor Safe 7. As the screen does not show the full passphrase on the screen, it is impossible to verify we get it right. I think it is very possible to make the same mistake twice when typing a new passphrase. For example the timing is important if we try to type two characters which are from the same button (for example “a” and “b”). Let’s say we want to type the word “abort”. We have to press “abc” once for the character “a”, wait a few seconds, and then press it again to get a “b”. If we press too quickly then the first character will be replaced.
Hence I think there is a very substantial risk of mis-typing the passphrase multiple times when creating a new passphrase protected wallet on the Trezor Safe 7. This can lead to a wallet being created with the wrong passphrase, and hence the loss of assets. I would really appreciate if you could provide new settings to disable this new behaviour so there is a way to be 100% we have types passphrases correctly.
Many thanks
Mark