In the scenario of a hybrid encryption for which I use RSA (asymmetric) to encrypt the encryption key used with AES (symmetric) to encrypt my message, I need to store the encrypted key together with the cipher text and all in the same column of the DB in order to then be able to request this value pair and perform the decryption.
What are the best practices for composing this pair: Simply an encrypted key + cipher text with an identifiable separator? Or something else?