文件列表:

.travis.yml (1127, 2017-02-16)
CHANGELOG (1166, 2017-02-16)
LICENSE.txt (10428, 2017-02-16)
benchmark (0, 2017-02-16)
benchmark\src (0, 2017-02-16)
benchmark\src\main (0, 2017-02-16)
benchmark\src\main\java (0, 2017-02-16)
benchmark\src\main\java\com (0, 2017-02-16)
benchmark\src\main\java\com\n1analytics (0, 2017-02-16)
benchmark\src\main\java\com\n1analytics\paillier (0, 2017-02-16)
benchmark\src\main\java\com\n1analytics\paillier\JavallierBenchmark.java (4147, 2017-02-16)
build.sbt (2787, 2017-02-16)
examples (0, 2017-02-16)
examples\fixedpointdecoding (0, 2017-02-16)
examples\fixedpointdecoding\src (0, 2017-02-16)
examples\fixedpointdecoding\src\main (0, 2017-02-16)
examples\fixedpointdecoding\src\main\java (0, 2017-02-16)
examples\fixedpointdecoding\src\main\java\examples (0, 2017-02-16)
examples\fixedpointdecoding\src\main\java\examples\fixedpointdecoding (0, 2017-02-16)
examples\fixedpointdecoding\src\main\java\examples\fixedpointdecoding\FixedPoint.java (4962, 2017-02-16)
examples\fixedpointdecoding\src\main\java\examples\fixedpointdecoding\Main.java (6336, 2017-02-16)
examples\privateSum (0, 2017-02-16)
examples\privateSum\build.sbt (163, 2017-02-16)
examples\privateSum\src (0, 2017-02-16)
examples\privateSum\src\main (0, 2017-02-16)
examples\privateSum\src\main\scala (0, 2017-02-16)
examples\privateSum\src\main\scala\PrivateSum.scala (1290, 2017-02-16)
project (0, 2017-02-16)
project\assembly.sbt (56, 2017-02-16)
project\plugins.sbt (249, 2017-02-16)
src (0, 2017-02-16)
src\main (0, 2017-02-16)
src\main\java (0, 2017-02-16)
src\main\java\com (0, 2017-02-16)
src\main\java\com\n1analytics (0, 2017-02-16)
src\main\java\com\n1analytics\paillier (0, 2017-02-16)
... ...

[](https://travis-ci.org/n1analytics/javallier) [](https://www.javadoc.io/doc/com.n1analytics/javallier_2.10) # javallier A Java library for [Paillier partially homomorphic encryption](https://en.wikipedia.org/wiki/Paillier_cryptosystem) based on [python-paillier](https://github.com/NICTA/python-paillier). The homomorphic properties of the paillier cryptosystem are: - Encrypted numbers can be multiplied by a non encrypted scalar. - Encrypted numbers can be added together. - Encrypted numbers can be added to non encrypted scalars. To use the library add the following dependency to your SBT configuration: libraryDependencies += "com.n1analytics" % "javallier_2.10" % "0.6.0" Example usages are provided in the `/examples` source directory. A benchmarking script can be found in `/benchmark`. ## Build Compile the library: $ sbt compile Create a jar file: $ sbt package Run all tests with `sbt`: $ sbt test Or run just fast tests: $ ./test-fast.sh ## Command Line Tool A small command line tool has been created to wrap the `javallier` library. Use the `javallier` cli tool to: - generate and serialize key pairs (of different key sizes) - encrypt and serialize signed floating point numbers given a public key - add two encrypted numbers together - add an encrypted number to a plaintext number - multiply an encrypted number by a plaintext number - decrypt an encrypted number given the private key Build the `javallier` CLI tool: sbt assembly This creates a `javallier.jar` jar file in: ./target/scala-2.10 To run it: java -jar javallier.jar Alternatively you can run directly with sbt: sbt "runMain com.n1analytics.paillier.cli.Main" ### Example CLI session $ java -jar javallier.jar genpkey --keysize 256 -m "Example keypair" examplekey.priv $ cat examplekey.priv | python -m json.tool { "kty": "DAJ", "key_ops": [ "decrypt" ], "pub": { "alg": "PAI-GN1", "kty": "DAJ", "kid": "Example keypair", "n": "AI9TjNmoL7p3j_D-RNK5AJQC1uDMtVvdy0MNi6ctj6Xn", "key_ops": [ "encrypt" ] }, "kid": "Example keypair", "lambda": "AI9TjNmoL7p3j_D-RNK5AJJ3odV_yUj39nLtFBMcrsoQ", "mu": "MDo136LqeN-R5W4kT2azGc6Y-cD77f6r_B6zncj48Eo" } $ java -jar javallier.jar extract examplekey.priv examplekey.pub $ java -jar javallier.jar encrypt examplekey.pub "12" -o encA.json $ java -jar javallier.jar encrypt examplekey.pub "8" -o encB.json $ java -jar javallier.jar addenc examplekey.pub encA.json encB.json -o encC.json $ java -jar javallier.jar decrypt examplekey.priv encC.json 20.0 $ java -jar javallier.jar add -o encD.json examplekey.pub encA.json 12 $ java -jar javallier.jar decrypt examplekey.priv encD.json 24.0 ## Releases Releases will be signed by [Brian Thorne](https://keybase.io/hardbyte) with the PGP key [22AD F3BF C183 47DE](https://pgp.mit.edu/pks/lookup?op=vindex&search=0x22ADF3BFC18347DE) ### Creating a release Update the version in `build.sbt` using [semantic versioning](http://semver.org/). Update the [CHANGELOG](./CHANGELOG), git tag the new release. Ensure you have sonatype credentials in `~/.sbt/0.13/sonatype.sbt`, and [install the pgp plugin](http://www.scala-sbt.org/sbt-pgp/) (`~/.sbt/0.13/plugins/pgp.sbt`). Run `sbt publishSigned`, then visit the [staging repositories](https://oss.sonatype.org/#stagingRepositories) of sonatype. **Close** the staging repository which will allow you to move to the release channel. Once you have successfully closed the staging repository, you can **release** it. For more information: * http://www.scala-sbt.org/release/docs/Using-Sonatype.html * http://central.sonatype.org/pages/releasing-the-deployment.html ## Limitation Adding two encrypted numbers where the exponents differs wildly may result in overflow in the `EncryptedNumber` domain. The addition result can be successfully decrypted and decoded but the computation result is incorrect. Current implementation does not detect such overflow.

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