Research Article
A QR Code Secret Hiding Scheme against Contrast Analysis Attack for the Internet of Things
Table 3
The revealed results of various situations.
| Variance | 0.1 | 0.3 | 0.5 | 0.7 | Gaussian noise | | | | | QR content | Readable | Readable | Readable | Readable | Secret | Decodable | Decodable | Decodable | Decodable |
| Noise ratio | 10% | 30% | 50% | 70% | Salt&Pepper noise | | | | | QR content | Readable | Readable | Readable | Readable | Secret | Decodable | Decodable | Decodable | Decodable |
| Compression ratio | 15% | 30% | 40% | 50% | Jpg compression | | | | | QR content | Readable | Readable | Readable | Readable | Secret | Decodable | Decodable | Decodable | Decodable |
| broken’s blocks | 1 | 2 | 4 | 8 | Image damage | | | | | QR content | Readable | Readable | Readable | Readable |
| Rotation angle | | | | | Rotation | | | | | QR content | Readable | Readable | Readable | Readable | Secret | Decodable | Decodable | Decodable | Decodable |
|
|