Timeline for How to send a fixed size encrypted message to be broadcast to multiple (known) recipients without letting the broadcaster decrypt the message
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 5, 2021 at 6:00 | history | tweeted | twitter.com/StackSecurity/status/1367716521439596549 | ||
| Mar 4, 2021 at 12:01 | answer | added | Manish Adhikari | timeline score: 0 | |
| Mar 4, 2021 at 0:52 | comment | added | brynk | You may wish to review Messaging Layer Security (MLS). Generally speaking, this protocol has a grouping layer between the recipients and the message(s). The message for the group is encrypted with a key derived for the group, and all members of the group can derive this key due to their participation. In your diagram, the gateway (the Delivery Service in MLS) won't be able to decrypt the message. This avoids the requirement for the sender to perform p encryptions for every message. | |
| Mar 3, 2021 at 22:36 | answer | added | mti2935 | timeline score: 2 | |
| Mar 3, 2021 at 20:20 | comment | added | Limit | If {R1, R2,...,Rp} is a fixed set, then you can consider sharing a key between just them. If its going to be a different group everytime, then I don't think you have much in terms of options. | |
| Mar 3, 2021 at 20:19 | review | First posts | |||
| Mar 3, 2021 at 23:02 | |||||
| Mar 3, 2021 at 20:14 | history | asked | warpcoder | CC BY-SA 4.0 |