class_docstr: Implementation for experiment payload builder
  using public key RSA encryption.
class_docstr_tok: ["Implementation","for","experiment","payload","builder","using","public","key","RSA","encryption","."]
code: def encrypt(self, payload: str):
      enc_key, enc_payload = self._encrypt_str(payload)
  
      enc_key_str = enc_key.decode("utf-8")
      enc_payload_str = enc_payload.decode("utf-8")
  
      return "{0},{1}".format(enc_key_str, enc_payload_str)
  
file_path: studio/studio/completion_service/encryptor.py
imports: import sys
  from Crypto.PublicKey import RSA
  from Crypto.Cipher import PKCS1_OAEP
  import nacl.secret
  import nacl.utils
  import base64
label_desc: Use image node_id 5 for calling the Encryptor obj's underlying member method code with example usage: obj.encrypt(payload) and returns: str