Xueyan Liu, Ruirui Sun, Linpeng Li, Wenjing Li, Tao Liu, Vol. 17, No. 9, September 30, 2023
10.3837/tiis.2023.09.013

• : Epidemiological survey
• Hierarchical Attribute-Based Encryption
• Characteristic value
• Multi-Authority
• Black Box

Xiaofei Wang, Wei Yang, Yan Liu, Rui Sun, Jun Hu, Longcheng Yang, Boyang Hou, Vol. 14, No. 4, April 30, 2020
10.3837/tiis.2020.04.009

• Douglas-Peucker algorithm
• vertical chord ratio
• radial distance constraint
• node importance
• detection of critical points