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payShield TMD is a compact, intuitive, self-contained secure cryptographic device (SCD) that enables you to securely manage symmetric keys. TMD generates keys in a manner that is compliant with relevant security standards, including X9 TR-31, ANSI X9.24-1 and PCI PIN Security. Unlike traditional approaches, this critical key management task can be carried out without any physical connection to a production HSM, providing greater operational flexibility without compromising security.