Ringtail (electronic signature with quantum protection)

History

2025: Product Announcement

On May 12, 2025, NTT announced the development of what is claimed to be the world's first electronic signature technology, which is not only quantum secure, but also provides high performance. The average signature generation time is 2.5 seconds between servers located on five continents.

Within the framework of the project, NTT collaborated with specialists from the Swiss Higher Technical School of Zurich, the University of California at Berkeley (USA), the University of Aalto (Finland), the Commercial University named after Luigi Bocconi (Italy), etc. A system called Ringtail, according to NTT, combines high efficiency, guaranteed security and quantum stability.

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Фото: NTT

Ringtail is a threshold signature based on standard cryptographic methods and using only two rounds of communication. When a threshold signature is applied, the signer is replaced by any eligible group of participants in such a way that the correct signature can only be formed with the participation of a certain number of community members. In other words, from the "n" participants, any "t" gets the opportunity to create joint signatures on behalf of the entire community at once. This approach reduces the risk of individual points of failure, such as theft/loss of a key or misuse by a single administrator.

To assess the performance of Ringtail servers , eight data centers in,,,,, Japan Singapore Germany the Ireland Brazil east and west coasts of the United States and c. Even Australia for the most remote locations (for example, -), Japan the average Brazil completion time of the entire distributed signature process was about 2.5 seconds. The technology is expected to be used in applications such as electronic voting, public services and financial systems. Ringtail^[1]

Notes