A Cryptographic Timestamping RFC3161 (requiring accuracy of second) is important mechanism for the long-term preservation of e-signatures, data sealing, proving document originality. Any place where consequences may have a financial impact or penalty of law, the trusted time stamping is no less important than synchronization. It proves non-repudiation when data was created, received or copied. This technology helps protect e-documents and chronology.
Please consider to use min. 1 – best if 2 redundantly operating time servers per single Data Center. Server can be configured on way of giving a ref. time to each other. Servers can be equipped with redundant powersupplys.
A very good idea is to use 2 redundant GNSS receivers. Two antenna-receivers helps prevent GPS jamming and spoofing. They can be installed on location 700 meters from time server each.
non-repudiation & data integrity
crypto timestamping RFC 3161