[cryptography] Can there be a cryptographic dead man switch?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Can there be a cryptographic dead man switch? A secret is to be revealed only if/when signed messages stop appearing. It is to be cryptographically strong and not rely on a trusted other party. The motivating application is a Living Trust wherein

Re: [cryptography] Can there be a cryptographic dead man switch?

Hi, what's the difference from a normal dead man switch that would reveal said secret if/when messages stop appearing. You can't check the signature of a message that isn't received, right? It could work in a way where the 'switch' sends a message and reveals the message if there is no signed

Re: [cryptography] Can there be a cryptographic dead man switch?

If the trustee (correct word?) stops passing the messages to your CDMS (cryptographic dead man switch), it would simply decrypt the original message automatically. So you can not put the entire mechanism in the hands of the trustee, especially not the part that authorizes the decryption. I could

Re: [cryptography] Can there be a cryptographic dead man switch?

So to be short: no, there cannot. The absence of new information cannot cause the information needed for decryption to become known. Unless you find some way to reverse that or use a hybrid crypto and non-crypto solution a DMS cannot happen. Anyone disagree? Note that a Bitcoin-like/distributed

Re: [cryptography] Can there be a cryptographic dead man switch?

On 2012-09-05 11:51 PM, StealthMonger wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Can there be a cryptographic dead man switch? A secret is to be revealed only if/when signed messages stop appearing. It is to be cryptographically strong and not rely on a trusted other party. Such