| CPC H04L 63/0869 (2013.01) [H04L 9/0643 (2013.01); H04L 67/133 (2022.05); H04L 67/306 (2013.01)] | 18 Claims |

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1. A method, comprising:
identifying, by one or more processors, from data maintained by a registry service, a plurality of second identifiers corresponding to a plurality of accounts that are associated with a first identifier;
performing, by the one or more processors, one or more hash functions on each of the plurality of second identifiers to obtain a hash value for a set of accounts;
reducing, by the one or more processors, each of the hash values to a predefined length to obtain a truncated hash value for each account of the set;
generating a data structure comprising an entry for each account that associates the truncated hash value for that account with application data associated with the account, and which does not include any of the plurality of second identifiers; and
transmitting, to an application backend service, a separate remote procedure call for each of the plurality of second identifiers.
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