[freenet-devl] Reverse SSK keys

[David McNab]

I know this has popped up at different times, but I'd like to put it forward for discussion again.   There's a lot of value to be gained in a new keytype, a kind of 'reverse SSK'. Perhaps call this keytype 'PAK' - Privately Accessible Key.   In other words:   1) Generate a public/private keypair 2) Trivial to convert the private key into a public key, but no way to convert public to private except by brute force against extreme orders of execution. 3) Insert under the pubkey - easy. 4) Requests using the pubkey fail - no data found 5) Requests using the privkey succeed - plain data comes back   I still know stuff-all about the node internals, but I could envisage anything inserted under the pubkey being stored, heavily encrypted, under a CHK. The PAK could be an SSK variant. PAK@pubkey physically contains a redirect to this CHK.   Upon request, the node converts PVK@privkey to PAK@pubkey to retrieve the key, then the privkey is used to decrypt the data.   Uses? Secure email. Secure payments. And many more.   Thoughts anyone?   David