[Cfrg] I-D Action: draft-irtf-cfrg-pairing-friendly-curves-05.txt
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Subject: [Cfrg] I-D Action: draft-irtf-cfrg-pairing-friendly-curves-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Crypto Forum RG of the IRTF. Title : Pairing-Friendly Curves Authors : Yumi Sakemi Tetsutaro Kobayashi Tsunekazu Saito Riad S. Wahby Filename : draft-irtf-cfrg-pairing-friendly-curves-05.txt Pages : 52 Date : 2020-06-09 Abstract: Pairing-based cryptography, a subfield of elliptic curve cryptography, has received attention due to its flexible and practical functionality. Pairing is a special map defined using elliptic curves and it can be applied to construct several cryptographic protocols such as identity-based encryption, attribute- based encryption, and so on. At CRYPTO 2016, Kim and Barbulescu proposed an efficient number field sieve algorithm named exTNFS for the discrete logarithm problem in a finite field. Several types of pairing-friendly curves such as Barreto-Naehrig curves are affected by the attack. In particular, a Barreto-Naehrig curve with a 254-bit characteristic was adopted by a lot of cryptographic libraries as a parameter of 128-bit security, however, it ensures no more than the 100-bit security level due to the effect of the attack. In this memo, we list the security levels of certain pairing-friendly curves, and motivate our choices of curves. First, we summarize the adoption status of pairing-friendly curves in standards, libraries and applications, and classify them in the 128-bit, 192-bit, and 256-bit security levels. Then, from the viewpoints of "security" and "widely used", we select the recommended pairing-friendly curves considering exTNFS. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-irtf-cfrg-pairing-friendly-curves/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-irtf-cfrg-pairing-friendly-curves-05 https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-pairing-friendly-curves-05 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-irtf-cfrg-pairing-friendly-curves-05 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
- [Cfrg] I-D Action: draft-irtf-cfrg-pairing-friend… internet-drafts
- Re: [Cfrg] I-D Action: draft-irtf-cfrg-pairing-fr… Yumi Sakemi