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Charles Guillemet Profile
Charles Guillemet

@P3b7_

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Following
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CTO at @ledger. Busy securing the blockchain revolution. Cryptography, (Hw) Security, Tech, Blockchain. Previously built the Donjon (@DonjonLedger)

Paris, France
Joined September 2018
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@P3b7_
Charles Guillemet
3 years
Privacy is a matter of freedom.
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@P3b7_
Charles Guillemet
12 minutes
In fact, not really.
@P3b7_
Charles Guillemet
1 day
You can get a 10-year UAE golden visa by staking $100k worth of $TON and pay a $35k fee. I wonder how this crypto was chosen 🤔.
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@P3b7_
Charles Guillemet
7 hours
Some interesting alpha regarding the 80,000 BTC transfer that occurred two days ago:. A few days prior to the 8 transfers of 10,000 BTC each ($8B transfer), someone sent messages to the corresponding 8 addresses using the OP_RETURN field. The messages included:. - "LEGAL NOTICE:.
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Charles Guillemet
1 day
You can get a 10-year UAE golden visa by staking $100k worth of $TON and pay a $35k fee. I wonder how this crypto was chosen 🤔.
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Charles Guillemet
2 days
Those were my top predictions for 2025 (written back in January). Looks like my crystal ball wasn't too far off 👀 . Should I drop a fresh list for H2?
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Charles Guillemet
2 days
Yesterday, 80,000 BTC (worth roughly $8 billion) were moved on-chain. These coins date back to 2011, before the BIP39 standard existed. Back then, private keys were managed individually per address, with no hardware wallet support (even today). This suggests the keys were stored.
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Charles Guillemet
3 days
Mood ✊. Cypherpunks created permissionless technology to escape (government) control, not to seek its approval. But now that governments are embracing crypto, we tend to build systems that look like crypto on the surface, yet aren’t truly decentralized underneath. In our rush.
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Charles Guillemet
4 days
RT @P3b7_: @RayDalio If only we had a global and permissionless currency!.
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Charles Guillemet
4 days
ETHCC in Cannes was a blast ✨. Great energy, tons of new projects, and strong momentum all around. I had the chance to present some of Ledger’s latest innovations:.1️⃣ Clear Signing Standard: Human-readable transaction details, directly on-device. 2️⃣ Transaction Checks on
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@P3b7_
Charles Guillemet
5 days
RT @nico186_: @P3b7_ joins the stage at @EthCC ! .I’ve been looking forward to this talk, I’m a huge fan of @Ledger and love my flex. Cle….
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Charles Guillemet
6 days
RT @lifiprotocol: Everyone holds Bitcoin. Almost no one can use it. @jzgulati, @P3b7_, @DominikHell6, @simonAharman, and @irena_clarke bre….
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Charles Guillemet
6 days
RT @tatum_io: Charles Guillemet is the CTO of @Ledger, a leading provider of hardware wallets for #cryptocurrency security. With over six….
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@P3b7_
Charles Guillemet
7 days
RT @mariusoffchain: « La sécurité de Bybit, de ces 1,4 milliard… le budget total c’est 79 € x 3. Le problème il est vraiment LÀ. ». Extrait….
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@P3b7_
Charles Guillemet
8 days
RT @CryptoastMedia: 🎥 [Nouvelle vidéo] : Crypto vs ordinateurs quantiques : le vrai risque ?. Charles Guillemet (Ledger) décrypte les menac….
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@P3b7_
Charles Guillemet
9 days
RT @zooko: Fun historical story that most people don’t know: when the US National Institutes of Standards and Technology selected Keccak to….
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@P3b7_
Charles Guillemet
11 days
Questions? We’ve got your back. The Nano S helped define self-custody. Now, we evolve, together.
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@P3b7_
Charles Guillemet
11 days
Ledger is built on open access and user choice:. 🔐 Your keys, your control. 🔄 Portability across devices, even outside of Ledger. 🚫 No lock-in.✍️ It’s an open platform, forever. You can even write your own app and side-load it by following the guidelines:.
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@P3b7_
Charles Guillemet
11 days
Ready for What's Next?. The Ledger Nano S Plus or Ledger Flex is the natural next step:. - More memory.- Wider screen.- Enhanced security with last generation EAL6+ Secure Element.- Upgrades like Clear Signing and Transaction Check. We’re even offering 20% off to help you make.
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@P3b7_
Charles Guillemet
11 days
BTC, ETH, and other major apps will remain functional on the Ledger Nano S for the foreseeable future. It still supports essential actions like sending, receiving, buying, selling, and swapping. However, upgrading ensures you're ready for what’s next, with access to the latest.
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