A mathematical model of the finding of usability problems
CHI '93 Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems
Secure group communications using key graphs
IEEE/ACM Transactions on Networking (TON)
Groupware walkthrough: adding context to groupware usability evaluation
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Tree-based group key agreement
ACM Transactions on Information and System Security (TISSEC)
How to make secure email easier to use
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Distributed Blinding for Distributed ElGamal Re-Encryption
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
Johnny 2: a user test of key continuity management with S/MIME and Outlook Express
SOUPS '05 Proceedings of the 2005 symposium on Usable privacy and security
Security and usability engineering with particular attention to electronic mail
International Journal of Human-Computer Studies - Special isssue: HCI research in privacy and security is critical now
Secrecy, flagging, and paranoia: adoption criteria in encrypted email
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Improved proxy re-encryption schemes with applications to secure distributed storage
ACM Transactions on Information and System Security (TISSEC)
Aligning usability and security: a usability study of Polaris
SOUPS '06 Proceedings of the second symposium on Usable privacy and security
Why Johnny can't encrypt: a usability evaluation of PGP 5.0
SSYM'99 Proceedings of the 8th conference on USENIX Security Symposium - Volume 8
Chosen-ciphertext secure proxy re-encryption
Proceedings of the 14th ACM conference on Computer and communications security
Cross-user analysis: Benefits of skill level comparison in usability testing
Interacting with Computers
From proxy encryption primitives to a deployable secure-mailing-list solution
ICICS'06 Proceedings of the 8th international conference on Information and Communications Security
Views, reactions and impact of digitally-signed mail in e-commerce
FC'05 Proceedings of the 9th international conference on Financial Cryptography and Data Security
Collusion resistant broadcast encryption with short ciphertexts and private keys
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Multiplex encryption: a practical approach to encrypting multi-recipient emails
ICICS'05 Proceedings of the 7th international conference on Information and Communications Security
Secure multicast using proxy encryption
ICICS'05 Proceedings of the 7th international conference on Information and Communications Security
Palantir: a framework for collaborative incident response and investigation
Proceedings of the 8th Symposium on Identity and Trust on the Internet
ProvSec'10 Proceedings of the 4th international conference on Provable security
EuroPKI'10 Proceedings of the 7th European conference on Public key infrastructures, services and applications
Proxy-invisible CCA-secure type-based proxy re-encryption without random oracles
Theoretical Computer Science
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Mailing lists are a natural technology for supporting messaging in multi-party, cross-domain collaborative tasks. However, whenever sensitive information is exchanged on such lists, security becomes crucial. We have earlier developed a prototype secure mailing list solution called SELS (Secure Email List Services) based on proxy encryption techniques [20], which enables the transformation of cipher-text from one key to another without revealing the plain-text. Emails exchanged using SELS are ensured confidentiality, integrity, and authentication. This includes ensuring their confidentiality while in transit at the list server; a functionality that is uniquely supported by SELS through proxy re-encryption. In this work we describe our efforts in studying and enhancing the usability of the software system and our experiences in supporting a production environment that currently is used by more than 50 users in 11 organizations. As evidence of its deployability, SELS is compatible with common email clients including Outlook, Thunderbird, Mac Mail, Emacs, and Mutt. As evidence of its usability, the software is being used by several national and international incident response teams.