The Defense Finance and Accounting Service (DFAS) and the Federal Retirement Thrift Savings Board are advising service members and government employees who participate in the Thrift Savings Plan (TSP) to stay away from mobile apps that refer to TSP. Such apps have not received official endorsement. Those that require logins could compromise the security of accounts. For more information about protecting TSP accounts, visit the plans Web site at https://www.tsp.gov.