Blockchain-Based Access Control Model to Preserve Privacy for Personal Health Record Systems

Table 2

The time requirements of the encryption/decryption operations for various data sizes.

Data Size	Encryption time of PRES (milliseconds)	Decryption time of PRES (milliseconds)	Encryption time of ABES (milliseconds)	Decryption time of ABES (milliseconds)
128 KB	91.18	3.19	366.46	161.69
512 KB	94.01	6.04	370.69	170.01
2 MB	101.19	16.62	375.85	179.67
8 MB	142.29	59.19	423.11	226.02
32 MB	303.37	238.33	593.05	405.03
128 MB	1828.21	1814.79	2242.42	1950.48