| Cover | Sep. 30, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 30, 2021 |
| Current Fiscal Year End Date | --09-30 |
| Entity File Number | 000-28745 |
| Entity Registrant Name | Cipherloc Corporation |
| Entity Central Index Key | 0001022505 |
| Entity Tax Identification Number | 86-0837077 |
| Entity Incorporation, State or Country Code | TX |
| Entity Address, Address Line One | 6836 Bee Caves Road |
| Entity Address, Address Line Two | Building 1 |
| Entity Address, Address Line Three | Suite 279 |
| Entity Address, City or Town | Austin |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 78746 |
| City Area Code | (512) |
| Local Phone Number | 772-4245 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
