On the Power of Quantum Encryption Keys. - Akinori Kawachi; Christopher Portmann (PQCrypto, 2008)

Characterization of the relations between information-theoretic non-malleability, secrecy, and authenticity. - Akinori Kawachi; Christopher Portmann; Keisuke Tanaka (IACR Cryptol. ePrint Arch., 2011)

Information-Theoretic Secrecy with Access to Decryption Oracles. - Christopher Portmann; Keisuke Tanaka (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

A modular framework for randomness extraction based on Trevisan's construction - Wolfgang Mauerer; Christopher Portmann; Volkher B. Scholz (CoRR, 2012)

Trevisan's Extractor in the Presence of Quantum Side Information. - Anindya De; Christopher Portmann; Thomas Vidick; Renato Renner (SIAM J. Comput., 2012)

Composable Security of Delegated Quantum Computation. - Vedran Dunjko; Joseph F. Fitzsimons; Christopher Portmann; Renato Renner (ASIACRYPT (2), 2014)

Cryptographic security of quantum key distribution. - Christopher Portmann; Renato Renner (CoRR, 2014)

Key Recycling in Authentication. - Christopher Portmann (IEEE Trans. Inf. Theory, 2014)

Quantum-Proof Multi-Source Randomness Extractors in the Markov Model. - Rotem Arnon Friedman; Christopher Portmann; Volkher B. Scholz (TQC, 2016)

(Quantum) Min-Entropy Resources. - Christopher Portmann (CoRR, 2017)

Composable security in relativistic quantum cryptography. - V. Vilasini; Christopher Portmann; Lídia del Rio (CoRR, 2017)

Quantum Authentication with Key Recycling. - Christopher Portmann (IACR Cryptol. ePrint Arch., 2017)

Causal Boxes: Quantum Information-Processing Systems Closed Under Composition. - Christopher Portmann; Christian Matt 002; Ueli Maurer; Renato Renner; Björn Tackmann (IEEE Trans. Inf. Theory, 2017)

Toward an algebraic theory of systems. - Christian Matt 002; Ueli Maurer; Christopher Portmann; Renato Renner; Björn Tackmann (Theor. Comput. Sci., 2018)

Composable and Finite Computational Security of Quantum Message Transmission. - Fabio Banfi; Ueli Maurer; Christopher Portmann; Jiamin Zhu (IACR Cryptol. ePrint Arch., 2019)

Revisiting (R)CCA Security and Replay Protection. - Christian Badertscher; Ueli Maurer; Christopher Portmann; Guilherme Rito (IACR Cryptol. ePrint Arch., 2020)

Unifying Generic Group Models. - Ueli Maurer; Christopher Portmann; Jiamin Zhu (IACR Cryptol. ePrint Arch., 2020)

Security in Quantum Cryptography. - Christopher Portmann; Renato Renner (CoRR, 2021)

Giving an Adversary Guarantees (Or: How to Model Designated Verifier Signatures in a Composable Framework). - Ueli Maurer; Christopher Portmann; Guilherme Rito (IACR Cryptol. ePrint Arch., 2021)

Multi-Designated Receiver Signed Public Key Encryption. - Ueli Maurer; Christopher Portmann; Guilherme Rito (IACR Cryptol. ePrint Arch., 2022)

Stateful Communication with Malicious Parties. - Chen-Da Liu-Zhang; Christopher Portmann; Guilherme Rito (IACR Cryptol. ePrint Arch., 2024)

Simpler and Stronger Models for Deniable Authentication. - Guilherme Rito; Christopher Portmann; Chen-Da Liu-Zhang (IACR Cryptol. ePrint Arch., 2025)