The 10-volume set constitutes the proceedings of the 46th Annual International Cryptology Conference (CRYPTO 2026), held in Santa Barbara, CA, USA, in August 2026.The 189 full papers included in the proceedings were carefully reviewed and selected from 781 submissions. The conference focus on Public-key cryptography, Symmetric-key cryptography, Cryptographic protocols, Foundations of cryptography, Mathematical cryptography, Cryptanalysis and much more.