Post-quantum security startup Project Eleven has announced raising $20 million in a Series A funding round that brings the total raised by the company to $26 million. The investment round was led by Castle Island Ventures, with additional support from Coinbase Ventures, Fin Capital, Formation, Lattice Fund, Nascent Ventures, Nebular, Quantonation, Satstreet Ventures, Variant, and an angel investor. Founded in 2024 by former US Army Infantry and Special Operations officer Alex Pruden, New York-based Project Eleven is building tools for organizations to migrate digital assets to the post-quantum era. The startup is known for Yellowpages, a post-quantum cryptographic solution for generating post-quantum keys for Bitcoin wallets, for open source variants of NIST-standardized post-quantum…