Exam 312-85 topic 1 question 12 discussion

Andrews and Sons Corp. has decided to share threat information among sharing partners. Garry, a threat analyst, working in Andrews and Sons Corp., has asked to follow a trust model necessary to establish trust between sharing partners. In the trust model used by him, the first organization makes use of a body of evidence in a second organization, and the level of trust between two organizations depends on the degree and quality of evidence provided by the first organization.
Which of the following types of trust model is used by Garry to establish the trust?