EC Cryptography Tutorials - Herong's Tutorial Examples

∟EC Cryptography in Java

∟EC Curves Supported by Java

This section provides is a list of named curves that are supported or not supported by 'keytool' and Java default library.

As a reference, here is a list of named curves that are supported or not supported by "keytool" and Java default library. RSA/DSA key sizes of equivalent strengths are also listed. 

Curve            Size   Strength   RSA/DSA   JDK 15
---------        ----   --------   -------   ------
secp112r1         112         56             Legacy
sect113r1         113         56             Legacy
secp128r1         128         64             Legacy
sect131r1         131         65             Legacy
secp160r1         160         80             Legacy
sect163r2         163         82             Legacy
c2tnb191v1        191         95             Legacy
secp192r1         192         96      1536   Legacy
sect193r1         193         96             Legacy
c2pnb208w1        208        104                 No
secp224r1         224        112      2048   Legacy
sect233k1         233        116             Legacy
prime239v1        239        119             Legacy
secp256r1         256        128      3072      Yes
c2pnb272w1        272        181                 No
sect283k1         283        141             Legacy
c2pnb304w1        304        152                 No
brainpoolP320r1   320        160             Legacy
c2tnb359v1        359        179             Legacy
c2pnb368w1        368        184                 No
secp384r1         384        192      7680      Yes
sect409k1         409        204             Legacy
c2tnb431r1        431        215             Legacy
brainpoolP512r1   512        256             Legacy
secp521r1         521        260     15360      Yes
sect571k1         571        285             Legacy

Table of Contents

 About This Book

 Geometric Introduction to Elliptic Curves

 Algebraic Introduction to Elliptic Curves

 Abelian Group and Elliptic Curves

 Discrete Logarithm Problem (DLP)

 Finite Fields

 Generators and Cyclic Subgroups

 Reduced Elliptic Curve Groups

 Elliptic Curve Subgroups

 tinyec - Python Library for ECC

 EC (Elliptic Curve) Key Pair

 ECDH (Elliptic Curve Diffie-Hellman) Key Exchange

 ECDSA (Elliptic Curve Digital Signature Algorithm)

 ECES (Elliptic Curve Encryption Scheme)

►EC Cryptography in Java

 "keytool -keyalg EC" - Generate EC Key Pair

 "keytool -groupname ..." - Select Curve Name

 Java Program to Generate EC Keys

 "Legacy SunEC curve disabled" Error

►EC Curves Supported by Java

 Standard Elliptic Curves

 Terminology

 References

 Full Version in PDF/EPUB