ECC public key encryption without symmetric cipher Imagine the following scenario. A process is running in background and permanently encrypting some data. An adversary has full control of the process, e.g. it can dump the process memory any time and read the symmetric key. It is essential that the adversary cannot decrypt the data, therefore only public-key encryption without any symmetric cipher component is feasible. 

What would be the best method for data encryption in this scenario using ECC?
ECC cant really be used to encrypt and decrypt data - it doesn't have the required properties. An asymmetric cipher such as RSA would have to be used, as this can encrypt and decrypt data.

ECC can be used for bilateral key exchanges, and to sign/verify data. RSA can sign/verify data, do KEMs, and encrypt/decrypt data.