Hardware Wallet Hack: Ledger Nano S – f00dbabe

The Ledger Nano S is a Cryptocurrency hardware wallet based on a secure element for storing cryptocurrencies, embedding a screen to check and secure digital payments. And also they have these information sheets where they proudly write: “Did you notice? There is no anti-tampering sticker on this box. A cryptographic mechanism checks the integrity of your Ledger device’s […]

SHA1 length extension attack on the Secure Filesystem – rhme2 Secure Filesystem (crypto 100)

in the previous videos of this series we havesetup everything. We flashed the challenge “Secure Filesystem”on to the board and figured out how to interact with it over a serial connection. We also learned about using pyserial to speakwith the embedded device via a python script. This means we are ready to solve some challenges So when you […]

Chatting about Cryptography and Exploit Regulations

all these doesn't matter after government spend secure crypto are you oh I just had this conversation recently with another person are you aware that cryptography is already heavy Lea regulated because as you remember cryptography was very important for Wars for you know encrypting communication so you still have actually a lot of regulations about crypto cryptography […]

Breaking ECDSA (Elliptic Curve Cryptography) – rhme2 Secure Filesystem v1.92r1 (crypto 150)

the first challenge I did from this competition was a secure file system which we exploited with a hash length extension attack and then we also solve this other cryptid challenge key server which was about breaking RSA signatures so let's continue the path and do the last crypto challenge I wonder what we will have to break […]

Google CTF: Beginner Quest: OCR IS COOL! (Simple Cryptography)

what is up everybody John Hammond here still looking at some of the Google capture-the-flag competition and the beginners quest content so Before we jump into that quick shout out to live overflow who is another awesome youtuber does the same cyber security capture flag hacking content stuff that I do and he was willing to play and […]

Searching for Bitcoins in GitHub repositories with Google BigQuery

Google offers a ton of services just Google search YouTube Gmail Drive but they also offer a cloud platform and one of the services there is big query big query is a fast fully managed enterprise data warehouse for large-scale data analytics bigquery can scan terabytes in seconds and petabytes and minutes a lot of buzzwords but what […]