# When Giants Use Toothpicks

Fireblocks is a digital asset custody platform, protecting trillions of dollars. During a security review at work I found how they protect their 4096-bit RSA 'disaster recovery' keys for customers with 2 rounds of MD5.

Following our responsible disclosure, Fireblocks has patched the issue.

The full technical breakdown and disclosure timeline is on our blog: [When Giants Use Toothpicks](https://blog.senthorus.ch/posts/when_giant_use_toothpicks/)

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> License: CC BY 4.0. To view a copy of this license, visit <https://creativecommons.org/licenses/by/4.0/>