Creating a function that accepts either string or byte[]

i have some function that is supposed to perform AES 256 encryption,

EncryptAes(byte[] plaintext, byte[] key)

EncryptAes(byte[] plaintext, byte[] key)

the problem is i want this function to accept either

string

string

byte[]

byte[]

but then i have to declare 3 other function overloads. So my approach was something like

EncryptAes(EncryptionInput plaintext, EncryptionInput key)

EncryptAes(EncryptionInput plaintext, EncryptionInput key)

and then a bunch of

public static implicit operator

public static implicit operator

s.

is this a good approach?