On Fri, Jul 12, 2019 at 07:26:21AM -0400, Sehrope Sarkuni wrote: > On Thu, Jul 11, 2019 at 9:05 PM Bruce Momjian <br...@momjian.us> wrote: > > > > On Thu, Jul 11, 2019 at 08:41:52PM -0400, Joe Conway wrote: > > > I vote for AES 256 rather than 128. > > > > Why? This page seems to think 128 is sufficient: > > > > > > https://crypto.stackexchange.com/questions/20/what-are-the-practical-differences-between-256-bit-192-bit-and-128-bit-aes-enc > > > > For practical purposes, 128-bit keys are sufficient to ensure > > security. > > The larger key sizes exist mostly to satisfy some US military > > regulations which call for the existence of several distinct > > "security > > levels", regardless of whether breaking the lowest level is already > > far > > beyond existing technology. > > > > We might need to run some benchmarks to determine the overhead of going > > to AES256, because I am unclear of the security value. > > If the algorithm and key size is not going to be configurable then > better to lean toward the larger size, especially given the desire for > future proofing against standards evolution and potential for the > encrypted data to be very long lived. NIST recommends AES-128 or > higher but there are other publications that recommend AES-256 for > long term usage: > > NIST - 2019 : Recommends AES-128, AES-192, or AES-256. > https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-131Ar2.pdf > > NSA - 2016 : Recommends AES-256 for future quantum resistance. > https://apps.nsa.gov/iaarchive/library/ia-guidance/ia-solutions-for-classified/algorithm-guidance/cnsa-suite-and-quantum-computing-faq.cfm > > ECRYPT - 2015 - Recommends AES-256 for future quantum resistance. > https://www.ecrypt.eu.org/csa/documents/PQC-whitepaper.pdf > > ECRYPT - 2018 - Recommends AES-256 for long term use. > https://www.ecrypt.eu.org/csa/documents/D5.4-FinalAlgKeySizeProt.pdf
Oh, interesting. Let's see what performance tests with the database show. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription +
