The following publications are possibly variants of this publication:
- A Realistic Protocol for Multi-party Certified Electronic MailJosep Lluís Ferrer-Gomila, Magdalena Payeras-Capellà, Llorenç Huguet i Rotger. iiswc 2002: 210-219 [doi]
- Certified e-Mail Protocol with Verifiable Third PartyMacià Mut Puigserver, Josep Lluís Ferrer-Gomila, Llorenç Huguet i Rotger. eee 2005: 548-551 [doi]
- An Efficient Protocol for Certified Electronic MailJosep Lluís Ferrer-Gomila, Magdalena Payeras-Capellà, Llorenç Huguet i Rotger. iiswc 2000: 237-248 [doi]
- Optimistic protocol for certified electronic mail with verifiable TTPJosep Lluís Ferrer-Gomila, M. Francisca Hinarejos, Gerard Draper-Gil, Llorenç Huguet i Rotger. csi, 57:20-30, 2018. [doi]
- A Solution for Secure Multi-Party Certified Electronic Mail Using BlockchainM. Francisca Hinarejos, Josep Lluís Ferrer-Gomila. access, 8:102997-103006, 2020. [doi]