| 摘要 |
Systems and methods are disclosed for anonymously comparing user groups, such as but not limited to crowds, to determine a degree of user overlap. In general, a hash value is obtained for a first user group, where the hash value includes a hash value component for a number of two-user permutations within the first user group. Similarly, a hash value is obtained for a second user group, where the hash value includes a hash value component for a number of two-user permutations within the second user group. Thereafter, a degree of user overlap between the first and second user groups is determined based on a comparison of the hash value for the first user group and the hash value for the second user group.
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