# libfnr

**Repository Path**: mirrors_cisco/libfnr

## Basic Information

- **Project Name**: libfnr
- **Description**: FNR is a small domain block cipher to encrypt small objects ( < 128 bits )
- **Primary Language**: Unknown
- **License**: LGPL-2.1
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-08
- **Last Updated**: 2026-05-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README


libFNR - A reference implementation library for FNR encryption scheme.

FNR represents "Flexible Naor and Reingold"

FNR is a small domain block cipher for encrypting
objects ( < 128 bits ) like IPv4, MAC, Credit Card numbers, Time Stamps etc.

## INSTALL

NOTE : openssl latest version (> openssl-1.0.1e) needs to be installed

```shell
# The bootstrap.sh step is only ncessary if you are building from a
# git clone; it is not necessary if you are building from a libfnr
# tarball.
$ bootstrap.sh

$ ./configure --enable-debug=yes
$ make
```

## RUN

```shell
$ cd test
$ ./ipv4test -p password -t  tweak -f raw-ips
```

IMPORTANT:  This is an *experimental* cipher, not for production yet.

Motivation and Applications of this scheme could be found at
http://cisco.github.io/libfnr/

Java extensions for this library could be found at
https://github.com/cisco/jfnr

Details of the Specification could be found in
doc/Spec directory

Report bugs to <libfnr-dev@external.cisco.com>

FNR is designed by
* Sashank Dara (sadara@cisco.com),
* Scott Fluhrer (sfluhrer@cisco.com)

Copyright (C) 2014-2015, Cisco Systems, Inc.