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AWS IoT – Unique Keys per each device – Data encryption

(Probably not the right board to ask. But here goes) I’m designing an IoT Solution with RPi as client and AWS as the server. On the client hardware, I have an Security Chip that can securely generate and store ECC, RSA, AES Keys/Pairs and can perform variety of cryptographic operations including ECDH, ECDSA, KeyGen, etc.,::Listen

(Probably not the right board to ask. But here goes)

I’m designing an IoT Solution with RPi as client and AWS as the server. On the client hardware, I have an Security Chip that can securely generate and store ECC, RSA, AES Keys/Pairs and can perform variety of cryptographic operations including ECDH, ECDSA, KeyGen, etc.,

My broader objectives on the cloud side are the following:

  1. On AWS Server side, I want to generate Unique ECC Keys per device, store them in HSM, perform ECDH to generate symmetric keys for encryption. I don’t want anyone (including me) to have access to the private keys generated by KMS (Or any other AWS Service – Encrypted or otherwise).
  2. I would like for the encryption and decryption operations to be performed by AWS services (preferably in a dedicated hardware made for that job). This is to avoid abuse of implementation bugs in my code.
  • While I can generate Data Encryption keys using KMS, I believe, I have to decrypt the private key in the code to use it. This means I have access to the private key.
  • I didn’t yet find way to do ECDH and then securely store the keys generated in that process.

Can you please help me the following:

  1. How to securely generate and store the ECC Keys for ECDH and ECDSA?
  2. Is there any service that can help me do the cryptographic operations (Encrypt, Decrypt, ECDH, ECDSA, etc.,) without me having to write the code for them?
Thanks!
tC

Wall Street jinx? Traders weight 'sell the news' potential after Bitcoin ETF launch

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