wiki:Crypto/ecdsa

Version 4 (modified by guest, 6 years ago) (diff)

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Lengths

The length of ciphers with comparable security.

Symmetric Key EC RSA Time to Break Machines Memory
56 112 430 < 5 min 105 trivial
80 160 760 600 months 4300 4Gb
96 192 1020 3*10^6 yrs 114 170Gb
128 256 1620 10^16 yrs 0.16 120Tb

Analysis by RSA-labs [1]

Symmetric EC Mod Discrete Log field Discrete Log Subgroup
80 160 1024 160
112 224 2048 224
128 256 3072 256
192 384 7680 384
256 512 15360 512

NESSIE recommendations [1]

RSA Keysize Lifetime
512 1 hour
576 10 hours
640 4 days
704 30 days
796 8 months
1024 1 year

IETF 2004 [2]

[1] ECRYPT II 2011 http://www.ecrypt.eu.org/documents/D.SPA.17.pdf
[2] http://www.ietf.org/internet-drafts/draft-ietf-msec-ipsec-signatures-03.txt