In a finitely repeated game with asymmetric information, we experimentally study how individuals adapt the nature of their lies when settings allow for reputation building. Although some can be detected ex post by uninformed party, others remain deniable. We find that traditional market mechanisms, such as reputation, generate strong changes in way people lie and lead to strategies which mainta...

We introduce two new cryptographic notions in the realm of public and symmetric key encryption. • Encryption with invisible edits is an encryption scheme with two tiers of users: “privileged” and “unprivileged”. Privileged users know a key pair (pk, sk) and “unprivileged” users know a key pair (pke, ske) which is associated with an underlying edit e to be applied to messages encrypted. Each key...

Releasing a classical digital signature faces to privacy issues. Indeed, there are cases where the prover needs to authenticate some data without making it possible for any malicious verifier to transfer the proof to anyone else. It is for instance the case for e-passports where the signature from the national authority authenticates personal data. To solve this problem, we can prove knowledge ...

A deniable authenticated key exchange (DAKE) protocol establishes a secure channel without producing cryptographic evidence of communication. A DAKE offers strong deniability if transcripts provide no evidence even if long-term key material is compromised (offline deniability) and no outsider can obtain evidence even when interactively colluding with an insider (online deniability). Unfortunate...