Question: who keeps private key in asymmetric key cryptography
[{'answer': 'the owner', 'provenance': [{'wikipedia_id': '24222', 'title': 'Public-key cryptography', 'start_paragraph_id': 1, 'start_character': 195, 'end_paragraph_id': 1, 'end_character': 204, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]