An identity-based key-exchange protocol
EUROCRYPT '89 Proceedings of the workshop on the theory and application of cryptographic techniques on Advances in cryptology
CRYPTO '89 Proceedings on Advances in cryptology
Authentication and authenticated key exchanges
Designs, Codes and Cryptography
Communications of the ACM
Handbook of Applied Cryptography
Handbook of Applied Cryptography
A Forward-Secure Digital Signature Scheme
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Off-the-record communication, or, why not to use PGP
Proceedings of the 2004 ACM workshop on Privacy in the electronic society
Secure deletion for a versioning file system
FAST'05 Proceedings of the 4th conference on USENIX Conference on File and Storage Technologies - Volume 4
OSDI'04 Proceedings of the 6th conference on Symposium on Opearting Systems Design & Implementation - Volume 6
Secure deletion of data from magnetic and solid-state memory
SSYM'96 Proceedings of the 6th conference on USENIX Security Symposium, Focusing on Applications of Cryptography - Volume 6
Improved user authentication in off-the-record messaging
Proceedings of the 2007 ACM workshop on Privacy in electronic society
Secure deletion for NAND flash file system
Proceedings of the 2008 ACM symposium on Applied computing
Validating Integrity for the Ephemerizer's Protocol with CL-Atse
Formal to Practical Security
A forward-secure public-key encryption scheme
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
Vanish: increasing data privacy with self-destructing data
SSYM'09 Proceedings of the 18th conference on USENIX security symposium
Degrees of security: protocol guarantees in the face of compromising adversaries
CSL'10/EACSL'10 Proceedings of the 24th international conference/19th annual conference on Computer science logic
Modeling and analyzing security in the presence of compromising adversaries
ESORICS'10 Proceedings of the 15th European conference on Research in computer security
Data remanence in flash memory devices
CHES'05 Proceedings of the 7th international conference on Cryptographic hardware and embedded systems
Data node encrypted file system: efficient secure deletion for flash memory
Security'12 Proceedings of the 21st USENIX conference on Security symposium
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We address the problem of confidentiality in scenarios where the attacker is not only able to observe the communication between principals, but can also fully compromise the communicating parties (their devices, not only their long term secrets) after the confidential data has been exchanged. We formalize this problem and explore solutions that provide confidentiality after the full compromise of devices and user passwords. We propose two new solutions that use explicit key deletion and forward-secret protocols combined with key storage on porter devices. Our solutions provide the users with control over their privacy. We analyze the proposed solutions using an automatic verification tool. We also implement a prototype using a mobile phone as a porter device to illustrate how the solution can be realized on modern platforms.