End Blind Signing: Trezor Shows Plain Text

When your hardware wallet shows you nothing but a string of hexadecimal characters before you approve, you are signing blind. That is changing for part of your transactions: on September 7, 2026, Trezor switched on a feature called Clear Signing, which translates contract data into readable sentences on the device display. cryptoticker.io collected the analysis below on September 9, 2026, and it shows how far the coverage really reaches: of the twenty largest Ethereum applications by capital deposited, exactly two are on the plain-text list at launch.

For you that means two things. The most important step is a firmware update, and there is nothing else to configure. The second step concerns everything the new standard does not yet cover, and that is the larger part of your everyday life in decentralised finance.

Blind signing: what you approve when you confirm a hexadecimal string

Blind signing describes the approval of a transaction whose content the device does not display in plain language, showing only a block of data or a checksum. In that case the wallet knows that it is signing something, but it cannot tell you what.

Until now the sequence looked like this. On your computer sits a comprehensible sentence, say the swap of 2,000 dollar tokens for ether. Only the so-called calldata block travels to the device, meaning the encoded function together with its parameters. A character string appears on the small display. You confirm and trust that the sentence on the large screen matches what the device is signing at that moment. In its own blog post, Trezor explicitly describes this sequence as an inversion of the principle: the wallet is supposed to be the last authority, not the computer.