I will do a short presentation at the #37c3 tomorrow 2:30 pm at Stage H (near c-base)
Bitcoin Wallet Seed Security
Bitcoin Wallet Seed Security - 37C3
Emzy
emzy@emzy.de
npub1ftd5...v5jq
#Internet and IT Professional.
#Bitcoin #Linux #ITSec
PGP Fingerprint:
9EDA FF80 E080 6596 04F4 A76B 2EBB 056F D847 F8A7
Hello from the 402 payment required assembly at the CCC Congress. 
I wanted to find out how hard it is to manipulate the @SeedSigner
. It was easy as expected. Never give it out of hand! Simple swap to a manipulated sd-card and it logs your seed to it. Later the attacker can collect the sd-card and get your seed words.
Total lines added to the code are six.
Needless to say, it writes the seed also to sd-card if you scan your backup seed.
The Mastodon instance 
got shut down. So I moved back to 
"emzy@mastodon.social"
BitcoinHackers.org | Welcome to BitcoinHackers.org
Mastodon
Emzy (@emzy@mastodon.social)
1.44K Posts, 144 Following, 42 Followers · Internet and IT Professional. FLOSS, Linux, Bitcoin and IT Security
PGP Fingerprint:
9EDA FF80 E080 6...