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Is ECDH still secure if I embed the server public key?

I'm pretty new to the concept of key exchange. Diffie-Hellman does not have authentication, so it makes no guarantees on who is the other party of the connection. Both key pairs (client/server) need ...
Reaper's user avatar
  • 103
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0 answers
98 views

Interactive ECDHE Authentication With Numeric Code

Trying to simplify my question, keeping only core concepts. Proposed solution: Both user devices generates ECDHE key pairs. Send pub keys to each other. Generate shared secret. Device that requests ...
Alexander Smirnov's user avatar
1 vote
1 answer
91 views

Secure Communication

Focus: I have to design a secure keep alive communication protocol and was wondering if it was necessary to sign the ciphertext after the session key has been generated as an attacker will not know ...
X3Gamma's user avatar
  • 13
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1 answer
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Secure communication channel recommendations

I'm working on a cryptography-related project, which uses ECC (elliptic curve cryptography). And one of the things that I need is a "secure" communication channel for two entities. I need someone to ...
valdo's user avatar
  • 359
13 votes
5 answers
8k views

What is the most secure ECC Curve?

I have for a while used Koblitz curve (sect571k1), in ECDH and ECDSA. But I have started wonder if it is the most secure. I prefer security over efficiency. So the curve doesn't have to be the most ...
BufferOverflow's user avatar
3 votes
1 answer
894 views

Do ECDH and ECDSA combined solution provide an authenticated protocol exchange solution in MCU environment?

I'm working on a project in MCU (micro controller) environment with GPRS connection to exchange data securely with the cloud. The encryption algorithm has been selected to use AES. I did some search ...
Johnny Shao's user avatar