A Hacken assessment reported by CoinDesk found that roughly half of USDT circulating on Tron, estimated at about $91.3 billion, is governed by a 2-of-3 multisignature arrangement with no built-in delay, cancellation process or revocation mechanism. The keys control administrative functions of Tether's token contract, including minting, freezing addresses, destroying frozen balances, collecting transfer fees and transferring ownership, rather than custody of individual users' wallets or balances. Hacken found no evidence that keys had been compromised or that a security incident occurred, but assigned USDT a cybersecurity score of 3.3 out of 10. Bluechip raised Tether's corporate rating to C from D after a KPMG audit found reserves exceeded liabilities by $6.8 billion. Hacken said reused signing keys could expose USDT deployments on Ethereum, Avalanche and Celo to related administrative risks.