Contact us Category listing - security
((V)irtual = Package is only listed here)
aide Free intrusion detection system for checking file integrity
aide06 Older intrusion detection system for checking file integrity
amap Applications and Services scanner
antonym Anonymous nymserver account maintenance tool
ap-modsecurity Intrusion detection and prevention engine for web applications
ap-modsecurity2 Intrusion detection and prevention engine for web applications
apg Tool set for random password generation
arirang Powerful webserver security scanner
asignify Yet another signify tool
avcheck Mail content filter for SMTP servers
base Analysis engine to process a database of security events
Bastille System hardening tool focusing on educating the user
bcrypt Cross platform file encryption utility
beecrypt Multipurpose cryptographic library
bitstir Entropy restoration daemon
botan Portable, easy to use, and efficient C++ crypto library
botan-devel Portable, easy to use, and efficient C++ crypto library
caff Various GnuPG related tools
ccid Middleware to access a smart card using SCard API (PC/SC)
cfs Encrypting file system, using NFS as its interface
chkrootkit Locally checks for signs of a rootkit
clamav Anti-virus toolkit
clamav-doc Anti-virus toolkit documents
clusterssh Cluster administration tool
CoolKey Driver support for the CoolKey and CAC products
courier-authlib Courier Authentication Library
crack The Sensible Unix Password Cracker
credns Validates DNSSEC in the DNS notify/transfer-chain
crypto++ Free C++ class library of Cryptographic Primitives
CSP Simple PKI Toolkit
cvm Credential Validation Modules
cy2-anonymous Cyrus SASL ANONYMOUS authentication plugin
cy2-crammd5 Cyrus SASL CRAM-MD5 authentication plugin
cy2-digestmd5 Cyrus SASL DIGEST-MD5 authentication plugin
cy2-gssapi Cyrus SASL GSSAPI authentication plugin
cy2-ldapdb Cyrus SASL LDAPDB authentication plugin
cy2-login Cyrus SASL LOGIN authentication plugin
cy2-ntlm Cyrus SASL NTLM authentication plugin
cy2-otp Cyrus SASL OTP authentication plugin
cy2-plain Cyrus SASL PLAIN authentication plugin
cy2-saml Crude SAML assertion validator for bridging WebSSO and SASL
cy2-scram Cyrus SASL SCRAM authentication plugin
cy2-sql Cyrus SASL SQL authentication plugin
cyrus-sasl Simple Authentication and Security Layer
cyrus-saslauthd Cyrus SASL plaintext authentication daemon
dcfldd Enhanced version of GNU dd with features useful for forensics
ddos-scan Scan for a limited set of distributed denial of service (ddos) agents
destroy Program to securely destroy files on the hard disk
dhbitty Small public key ECDH encryption/decryption program
dirb Web Content Scanner
dirmngr X509 certificate and CRL downloader
dnssec-tools Toolkit to ease the deployment of DNSSEC related technologies
dropbear Small SSH2 server and client, aimed at embedded market
dsniff Password sniffer (webspy)
dsniff-nox11 Password sniffer
EasyPG GnuPG interface for emacs
egd EGD: Entropy Gathering Daemon
engine-pkcs11 PKCS#11 engine for OpenSSL
ent Entropy calculation and analysis of putative random sequences
ettercap (V) Multipurpose sniffer/interceptor/logger for switched LAN
f-prot-antivirus6-fs-bin F-PROT antivirus for File Servers
f-prot-antivirus6-ms-bin F-PROT antivirus for Mail Servers
f-prot-antivirus6-ws-bin F-PROT antivirus for workstations
fail2ban Scans log files and bans IP that makes too many password failures
flawfinder Python program to find flaws in C/C++ programs
fprint-demo Simple GTK+ application to demonstrate libfprint's capabilities
fragroute Tool for intercepting, modifying and rewriting egress traffic
fsh Fast remote command execution
fwbuilder Firewall Builder GUI
gnome-keyring GNOME password and secret manager
gnome-keyring-manager GNOME password and secret manager
gnome-keyring-sharp Mono implementation of gnome-keyring
gnu-crypto GPL implementation of the Java Crypto Extensions
gnu-pw-mgr Password manager
gnupg GNU Privacy Guard, public-Key encryption and digital signatures
gnupg-pkcs11-scd OpenSC smart card support for GnuPG
gnupg2 GNUpg with OpenPGP and S/MIME capabilities
gnutls GNU Transport Layer Security library
go-oauth2 OAuth 2 library for Go
google-authenticator One-time password generator and PAM module from Google
gpa GUI frontend to gnupg
gpass GNOME Password Manager
gpg2dot Converts your GnuPG keyring to a graph of associations
gpgme GnuPG Made Easy
gpshell Shell to manage the contents of GlobalPlatform smart cards
gsasl GNU implementation of the Simple Authentication and Security Layer
gss GNU Generic Security Service Library
gtk-systrace GTK interface to systrace(1)
guardtime Command line client for GuardTime keyless signature service
hackbot Vulnerability scanner written in Perl
hashcash Hash collision based postage stamp
heimdal Kerberos 5 implementation
heirloom-su Collection of standard Unix utilities (su)
HElib Homeomorphic Encryption library
honeyd Small daemon that creates virtual hosts on a network
honeyd-arpd ARP daemon for honeyd
hs-digest Various cryptographic hashes for bytestrings; CRC32 and Adler32
hydan Steganography tool for covert comms, signing and watermarking
hydra Login password cracker
ike-scan Fingerprinting IKE implementation
ipsec-tools IPsec-tools racoon IKE daemon
ipv6-toolkit IPv6 security assessment and troubleshooting tool
isakmpd OpenBSD IKE daemon
jessie GPL implementation of the Java Secure Sockets Extension
john Unix Password Cracker
KeePass Free, open source, light-weight and easy-to-use password manager
keepassx Password manager or safe
keychain Nice ssh-agent front-end
kgpg KDE encryption tool
knc Kerberised NetCat
kpcli Command line interface to KeePass password safes
kssh KDE Front-end to SSH
kstart Kerberos v5 kinit daemon that uses keytabs
kwalletmanager KDE wallet manager
lasso Liberty Alliance Single Sign On implementation
libassuan The IPC library used by some GnuPG related software
libassuan2 IPC library used by some of the other GnuPG related packages
libbf Blowfish block cipher library
libcrack Password checking library
libcurvecpr Uses elliptic-curve cryptography to encrypt and authenticate data
libdes Small DES (Data Encryption Standard) lib & standalone program
libfprint Fingerprint reader access library
libfwbuilder Firewall Builder API
libgcrypt GNU cryptographic library
libgfshare Library to implement Shamir's secret sharing scheme
libglobalplatform C library for managing GlobalPlatform smart card contents
libgnome-keyring GNOME password and secret manager
libgpg-error Definitions of common error values for all GnuPG components
libguardtime GuardTime Client C SDK
libidea IDEA block cipher library
libident Small library to interface to the ident protocol server (rfc1413)
libksba X.509 library
libmcrypt Crypto algorithms library
libmerkletree Calculate and verify Merkle tree digests
libmultigest Multiple, concatenated digest value calculation library
libnetpgpverify PGP and ssh signature verification library
liboauth Embeddable oauth 1.0 implementation
libp11 Convenience library for easy PKCS#11 implementation
libpbc Pair-based cryptographic library based on Gap Diffie Helman groups
libprelude LibPrelude libraries and c++ easy bindings
libprelude-lua Lua bindings to LibPrelude
libprelude-perl Perl bindings to LibPrelude
libprelude-python Python bindings to LibPrelude
libprelude-ruby Ruby bindings to LibPrelude
libpreludedb Provides an interface to the database used to store IDMEF alerts
libpreludedb-mysql Provides an interface to the database used to store IDMEF alerts
libpreludedb-perl Provides an interface to the database used to store IDMEF alerts
libpreludedb-pgsql Provides an interface to the database used to store IDMEF alerts
libpreludedb-python Provides an interface to the database used to store IDMEF alerts
libpreludedb-sqlite3 Provides an interface to the database used to store IDMEF alerts
libsecret GObject based library for accessing the Secret Service API
libsodium Library for build higher-level cryptographic tools
libssh SSHv2+v1 protocol library; libssh.org version 0.5.4
libssh2 SSH2 protocol library
libtasn1 ASN.1 structure parser library
libtcpa TCPA libraries and test programs from IBM
libtomcrypt Tom St Denis's cryptographic library
libykneomgr Yubikey NEO C library and command-line tool
libyubikey Yubikey library
log2timeline Framework for automatic creation of a super timeline
logcheck Auditing tool for system logs on Unix boxes
lsh SSH2 client/server
lua-sec Lua binding for OpenSSL library
mbedtls Lightweight, modular cryptographic and SSL/TLS library
mcrypt Replacement to crypt(1), supports many crypto algorithms
md4-collision MD4 Collision generator
md5-collision MD5 Collision generator
merkletree Library and utility to calculate merkle trees
mhash Hash algorithms library
mirrordir Directory mirroring tool
mit-krb5 MIT Kerberos 5 authentication system
mit-krb5-appl MIT Kerberos 5 authentication system applications
mixminion Anonymous Type 3 remailer
mozilla-rootcerts Root CA certificates from the Mozilla Project
mozilla-rootcerts-openssl Wedge for installing and managing mozilla-rootcerts
msu Mini passwordless su
msudir Easy setuid script management
multigest Library and utility to calculate multiple message digests
munge Authentication service for creating and validating credentials
MyPasswordSafe Easy-to-use password manager
nacl Secure, usable, fast networking and cryptography library
netpgp PGP signing, verification, encryption and decryption program
netpgpverify Standalone PGP and ssh signature verification utility
netramet NEtwork TRaffic METer
nettle Cryptographic library
nfsbug NFS security verification suite
nikto URL scanner used to search for known vulnerable CGIs on websites
oath-toolkit OATH (Open AuTHentication) Toolkit
ocaml-cryptokit Cryptographic primitives library for Objective Caml
ocaml-ssl SSL library for OCaml
opencdk Open Crypto Development Kit
openct Smart Card Reader drivers and middleware
opendnssec OSS for a fast and easy DNSSEC deployment
openpam Open-source PAM library
opensaml Security Assertion Markup Language (SAML)
opensc Smart Card drivers and middleware
openssh Open Source Secure shell client and server (remote login program)
openssl Secure Socket Layer and cryptographic library
openvas-client Client for the Open Vulnerability Assessment System
openvas-libnasl Libraries for the Open Vulnerability Assessment System
openvas-libraries Libraries for the Open Vulnerability Assessment System
openvas-plugins Plugins for the Open Vulnerability Assessment System
openvas-server Server for the Open Vulnerability Assessment System
otpCalc OTP and S/Key calculator for X
otptool One-Time Password command line utility
p0f Passive OS fingerprinting tool
p11-kit PKCS
p5-Apache2-AuthCASSimple (V) Apache2 module to authenticate through a CAS server
p5-AuthCAS AuthCAS - Client library for CAS 2.0 authentication server
p5-Authen-CAS-Client Perl 5 module providing an interface for JA-SIG's CAS
p5-Authen-Htpasswd Interface to read and modify Apache .htpasswd files
p5-Authen-PAM Authentication via PAM
p5-Authen-PluggableCaptcha Perl5 module implementing a pluggable Captcha framework
p5-Authen-SASL Perl module to handle SASL authentication
p5-Authen-SASL-Authd Perl module to handle SASL auth via Cyrus saslauthd or Dovecot
p5-Authen-SASL-Cyrus Perl module to handle Cyrus protocol for SASL authentication
p5-Authen-Simple Simple and consistent framework for authentication
p5-Authen-TacacsPlus Perl extension for authentication using tacacs+ server
p5-BSD-arc4random Perl interface to the arc4 random number generator
p5-Bytes-Random-Secure Perl extension to generate cryptographically-secure random bytes
p5-Crypt-Blowfish Perl5 Blowfish implementation
p5-Crypt-Blowfish_PP Blowfish encryption algorithm implemented purely in Perl
p5-Crypt-CAST5_PP The CAST5 block cipher, implemented in pure Perl
p5-Crypt-CBC Perl5 cipher block chaining mode for various crypto algorithms
p5-Crypt-CipherSaber Perl5 module for the CipherSaber encryptions
p5-Crypt-DES XS-based DES implementation for Perl
p5-Crypt-DES_EDE3 Perl5 module for Triple-DES EDE encryption/decryption
p5-Crypt-DH Perl5 module for the Diffie-Hellman key exchange system
p5-Crypt-DH-GMP Crypt::DH Using GMP Directly
p5-Crypt-DSA Perl5 module for the DSA public key algorithm
p5-Crypt-ECB Perl5 Electronic Codebook mode for various crypto algorithms
p5-Crypt-Eksblowfish Perl5 Eksblowfish block cipher
p5-Crypt-GeneratePassword Generate secure random pronounceable passwords
p5-Crypt-GPG Object Oriented Interface to GnuPG
p5-Crypt-IDEA Perl5 module for the IDEA symmetric key algorithm
p5-Crypt-OpenPGP Pure-Perl OpenPGP implementation
p5-Crypt-OpenSSL-AES Perl5 wrapper module for the OpenSSL AES functions
p5-Crypt-OpenSSL-Bignum Perl5 wrapper module for the OpenSSL Bignum functions
p5-Crypt-OpenSSL-DSA Perl5 wrapper module for the OpenSSL DSA functions
p5-Crypt-OpenSSL-Random Perl5 wrapper module for OpenSSL pseudo-random number generator
p5-Crypt-OpenSSL-RSA Perl5 wrapper module for the OpenSSL RSA functions
p5-Crypt-PasswdMD5 MD5-based crypt() function
p5-Crypt-Primes Perl5 module for provable prime number generation
p5-Crypt-Random Perl5 interface to /dev/random
p5-Crypt-Random-Seed Simple method to get strong randomness
p5-Crypt-Random-TESHA2 Random numbers using timer/schedule entropy
p5-Crypt-RandPasswd Random password generator based on FIPS-181
p5-Crypt-RC4 Perl5 module for the alleged RC4 encryption algorithm
p5-Crypt-Rijndael Crypt::CBC compliant Rijndael encryption module
p5-Crypt-RIPEMD160 Perl5 module of the RIPEMD160 hash function
p5-Crypt-RSA Perl5 module of the RSA public key algorithm
p5-Crypt-SmbHash Perl5 module for generating LM/NT hashes
p5-Crypt-SSLeay Crypt::SSLeay - OpenSSL glue that provides LWP https support
p5-Crypt-Twofish Perl5 module for the Twofish symmetric key algorithm
p5-Crypt-URandom Perl5 module to provide non blocking randomness
p5-Crypt-X509 Perl 5 module to parse a X.509 certificate
p5-Dancer-Plugin-Auth-RBAC Dancer Authentication, Security and Role-Based Access Control Framework
p5-Data-SimplePassword Simple random password generator
p5-Digest Perl5 base class for Digest:: modules
p5-Digest-BubbleBabble Perl5 module for bubble babble fingerprints
p5-Digest-CRC Perl5 extension interface for cyclic redundancy check algorithms
p5-Digest-Hashcash Perl5 extension module for hashcash hashes
p5-Digest-HMAC Perl5 module for HMAC
p5-Digest-JHash Perl extension for 32 bit Jenkins Hashing Algorithm
p5-Digest-MD2 Perl5 module for MD2
p5-Digest-MD4 Perl5 module for MD4 hash algorithm
p5-Digest-MD5 Perl5 extension interface for MD5 algorithm
p5-Digest-MD5-File Perl5 extension for getting MD5 sums for files and urls
p5-Digest-Nilsimsa Perl5 extension module for Nilsimsa signatures
p5-Digest-Perl-MD5 Perl implementation of Ron Rivests MD5 Algorithm
p5-Digest-SHA Perl module for SHA-1/224/256/384/512 algorithms
p5-Digest-SHA1 Perl5 module for SHA1
p5-Digest-SHA3 Perl5 module for SHA-3
p5-File-KeePass Perl module interface to KeePass V1 and V2 database files
p5-GD-SecurityImage (V) Perl5 security image (CAPTCHA) generator
p5-GnuPG-Interface Perl interface to GnuPG
p5-GSSAPI Perl extension providing access to the GSSAPIv2 library
p5-IO-Socket-SSL Perl5 SSL socket interface class
p5-Module-Signature Perl 5 module for module signature file manipulation
p5-Mozilla-CA Mozilla's CA cert bundle for Perl
p5-Net-DNS-SEC DNSSEC extension to Net::DNS Perl DNS Resolver Module
p5-Net-DNS-SEC-Maint-Key DNSSEC key and key-set maintenance classes and tool
p5-Net-OpenSSH Perl SSH client package implemented on top of OpenSSH
p5-Net-SSH Perl implementations of SSH1 and SSH2 protocols
p5-Net-SSLeay Perl5 module for using OpenSSL
p5-OpenSSL Perl5 wrapper module for the OpenSSL functions
p5-pcsc Allows communication with a smart card from a Perl script
p5-Sereal-Decoder (V) Perl5 module for fast, compact, powerful binary deserialization
p5-Sereal-Encoder (V) Perl5 module for fast, compact, powerful binary serialization
p5-SHA Perl5 interface to the SHA1 algorithm
p5-String-Random Perl module to generate random strings based on a pattern
p5-Text-Password-Pronounceable Generate pronounceable passwords
p5-Tie-EncryptedHash Perl5 module for hashes with encrypting fields
PACK Password analysis and cracking kit
pakchois PKCS#11 wrapper library
pakemon Packet monster, an Open Source Intrusion Detection System
pam_ssh_agent_auth PAM module which permits authentication via ssh-agent
pam-af Anti-bruteforce PAM module
pam-dbm PAM module for DBM authentication
pam-fprint PAM module to provide authentication using fingerprint readers
pam-krb5 Very flexible kerberos module for the PAM framework
pam-ldap Pluggable authentication module for LDAP directories
pam-mkhomedir Pluggable authentication module for automatic homedir creation
pam-mysql PAM module for authenticating with MySQL
pam-p11 Smart card PAM module
pam-passwdqc Password strength checker
pam-pgsql PAM module to authenticate using a PostgreSQL database
pam-pwauth_suid PAM authentication module for unprivileged users
pam-radius PAM module for authentication against a RADIUS server
pam-saml Crude SAML assertion validator for bridging WebSSO and PAM
pam-tacplus TACACS+ client library and PAM module
pam-yubico Pluggable Authentication Module for Yubikey validation
paperkey Extract essence of OpenPGP secret key for printing
paros (V) HTTP/HTTPS proxy for assessing web application vulnerabilities
password-store Standard UNIX password manager
pcsc-lite Middleware to access a smart card using SCard API (PC/SC)
pcsc-tools Tools useful for a PC/SC user
pev The PE analysis toolkit
pgp2 Public-key encryption and digital signature utility (v2)
pgp5 Public-key encryption and digital signature utilities (v5)
pgpdump PGP packet visualizer
pgpenvelope GnuPG and Pine/Procmail integration tool
php-mcrypt PHP extension for the mcrypt crypto algorithms library
php-oauth PHP oauth consumer extension
php-ssdeep PHP extension for ssdeep
php-ssh2 PHP bindings to the functions of libssh2
php-suhosin Advanced protection system for PHP installations
pine-pgp-filters (V) Filters to integrate Pine with gnupg or pgp
pinentry Applications for entering PINs or Passphrases
pinentry-gtk2 Applications for entering PINs or Passphrases, gtk2 enabled
pinentry-qt4 Applications for entering PINs or Passphrases, qt4 enabled
pinepgp PGP display and sending filters for pine
pkcs11-helper Library that simplifies the interaction with PKCS#11
pks PGP Public Key Server
policykit Framework for managing admin policies and privileges
policykit-gnome GNOME dialogs for PolicyKit
polkit-qt Qt Wrapper around PolicyKit
PortableSigner Tool for digital signing (with X.509 certificates) of PDF files
portsentry Detects and respond to port scans against a target host in real-time
prelude-correlator Intrusion event correlation engine
prelude-lml Log analyzer monitoring your logfile and received syslog messages
prelude-manager Prelude IDS manager
prelude-pflogger Prelude sensor for Packet Filter (pf)
priv Execute commands as a different user
prngd Pseudo Random Number Generator Daemon
pscan Security C code scanner for misuse of format strings
putty Free implementation of Telnet and SSH for Win32 and Unix platforms
pwsafe CLI based PasswordSafe compatible password manager
py-asn1 ITU Abstract Syntax Notification for Python
py-asn1-modules Modules for ITU Abstract Syntax Notification for Python
py-backports.ssl_match_hostname Python SSL support module for Python 2
py-bcrypt Modern password hashing for your software and your servers
py-crack Python interface to cracklib
py-cryptkit Python Cryptographic Toolkit
py-crypto Cryptographic and hash functions for Python
py-cryptography Cryptographic recipes and primitives for Python
py-cryptopp Python wrapper for (and copy of parts of) crypto++
py-cybox Python library for manipulating CybOX content
py-denyhosts Watch auth log for invalid ssh login attempts and block hosts
py-Des DES implementation in python
py-ecdsa Easy-to-use implementation of ECDSA cryptography
py-ezPyCrypto Easy Python API for strong encryption
py-flask-sslify (V) Force SSL on your Flask app
py-gnupg Python module for GnuPG interface
py-hsm Python package that talk to a YubiHSM
py-itsdangerous Helpers to pass trusted data to untrusted environments and back
py-Kerberos Python Kerberos implementation
py-keyring Store and access your passwords safely
py-lasso Liberty Alliance Single Sign On implementation
py-libtaxii Python library for handling TAXII Messages and Services
py-m2crypto Crypto and SSL toolkit for Python
py-mcrypt Python interface to mcrypt library
py-oauth Python OAuth library
py-oauth2 Python OAuth2 library
py-oauth2client Python library for accessing resources protected by OAuth 2.0
py-oauthlib Generic implementation of the OAuth request-signing logic
py-openid Python module for OpenID
py-OpenSSL Python interface to the OpenSSL library
py-paramiko SSH2 protocol library
py-passlib Comprehensive password hashing framework supporting over 30 schemes
py-prewikka Prelude-IDS console
py-py-bcrypt Provides bcrypt password hashing and key derivation in python
py-pydeep Python bindings for ssdeep
py-requests-oauthlib OAuthlib support for Python-Requests
py-rsa Pure-Python RSA implementation
py-service_identity Service identity verification for pyOpenSSL
py-smbpasswd Python SMB Password Hash Generator
py-SSLCrypto Python bindings for openssl
py-stix Python library for manipulating STIX content
py-tlslite SSL 3.0, TLS 1.0, and TLS 1.1 in Python
py-xmlsec Python bindings for XMLSec Library
py-yara Yara python bindings
py-yubiauth YubiAuth authentication backend
pyca Administration tools for X.509/PKIX CA
qca Cross-platform crypto API for QT
qca-tls Cross-platform crypto API for QT - TLS plugin
qca2 Cross-platform crypto API for QT
qca2-gnupg Cross-platform crypto API for QT - GnuPG plugin
qca2-ossl Cross-platform crypto API for QT - OpenSSL plugin
qident Small program to query an ident protocol server (rfc1413)
qoauth OAuth library for Qt
qore-asn1-module ASN.1 Qore module
qore-ssh2-module SSH2 module for Qore
qore-xmlsec-module XMLSec module for Qore
qt4-qtkeychain Platform-independent Qt API for storing passwords securely
R-digest Create cryptographic hash digests of R objects
racoon2 IPsec key management system (IKEv2, IKEv1, and KINK)
rainbowcrack Hash cracker
rats Rough Auditing Tool for Security
rc5des Binaries for taking part in the rc5des challenge
rid Remote Intrusion Detection to track down compromised hosts
rsaref Encryption/authentication library, RSA/MDX/DES
ruby-bcrypt OpenBSD's bcrypt() password hashing algorithm for Ruby
ruby-ezcrypto Ruby object-oriented wrapper for OpenSSL libraries
ruby-highline (V) High-level console IO library
ruby-hmac Common interface to HMAC functionality
ruby-net-scp Secure copy for Ruby
ruby-net-sftp Secure FTP for Ruby
ruby-net-ssh Secure shell for Ruby
ruby-net-ssh-gateway Simple way to connect to servers behind a firewall or NAT
ruby-net-ssh-multi SSH connection multiplexing
ruby-oauth OAuth Core Ruby implementation
ruby-openid OpenID support for Ruby
ruby-password Suite of password handling methods for Ruby
ruby-rack-openid Provides a more HTTPish API around the ruby-openid library
ruby-rc4 Pure Ruby implementation of the RC4 algorithm
ruby-ruby-openid Library for consuming and serving OpenID identities
ruby-shadow Access to shadow passwords on Linux and Solaris
ruby-simple_oauth Simple builds and verifies OAuth headers
ruby-sshkit Makes it easy to write structured, testable SSH commands
ruby-tcpwrap TCP wrappers library for Ruby
ruby-twitter_oauth Ruby client for the Twitter API using OAuth
sbd HMAC & one-time pad-based remote login program
scanssh SSH remote version scanner
scrypt The scrypt encryption utility
seahorse GnuPG front end and bonobo component for GNOME
seahorse-plugins Plugins for the GnuPG front end and bonobo component for GNOME
seccure SECCURE Elliptic Curve Crypto Utility for Reliable Encryption
secpanel GUI front-end for SSH
sfs Secure, global, self-certifying network file system
sign File signing and signature verification utility
skey Port of OpenBSD s/key implementation
sks Self Replicating PGP Key Server
sleuthkit The Sleuth Kit (TSK) opensource forensic toolkit
smaSHeM System V shared memory segment manipulator
smtpd Store and forward SMTP proxy
sniff Program to sniff logins and passwords
snoopy Log every executed command to syslog
snortsnarf Generate HTML report summaries from snort incident alerts
snow Whitespace steganography program
softhsm Cryptographic store accessible through a PKCS#11 interface
spiped Tool for creating symmetrically encrypted and authenticated pipes
srm Secure replacement for rm(1)
srp_client Client programs using Secure Remote Password protocol
ssdeep Program computing context triggered piecewise hashes (CTPH)
ssh-askpass X11-based passphrase dialog for OpenSSH
ssh-ip-tunnel Simple VPN system using pppd over ssh
sshfp Print ssh host key fingerprint resource records
sshguard Protect networked hosts from brute force attacks
sshpass Non-interactive ssh password auth
ssldump SSLv3/TLS network protocol analyzer
sslproxy Small SSL proxy
sslscan Fast SSL Scanner
sslsplit Transparent and scalable SSL/TLS interception
sslwrap Simple SSL wrapper
ssss Shamir's Secret Sharing Scheme
starttls Simple wrapper program for STARTTLS on emacsen
steghide Hides data (steganography) in audio or graphics files
stegtunnel Provides a covert channel in the IPID and sequence number
stud Scalable TLS Unwrapping Daemon
stunnel Universal SSL tunnel
sudo Allow others to run commands as root
systrace-policies Systrace policy examples
tacshell RSA ACE/Server sdshell workalike, using TACACS+
tcl-tls TLS (aka SSL) Channel for the Tcl language
tcp_wrappers Monitor and filter incoming requests for network services
tct Programs to aid post-mortem after a break-in
tkpasman Username and password manager that uses the Tk toolkit
tripwire File and directory integrity checker
TweetNaCl World's first auditable high-security cryptographic library
uvscan Evaluation version of a DOS/Windows file virus scanner
validns Validns, a high performance DNS/DNSSEC zone validator
volatility Advanced memory forensics framework
whisker (V) URL scanner used to search for known vulnerable CGIs on websites
xml-security-c XML Digital Signature specification implementation
xmlsec1 XML signature and encryption library
yafic File integrity checker
yara Pattern matching swiss knife for malware researchers
ykclient Libraries for online validation of Yubikey OTPs
ykpers Yubico's YubiKey re-programming toolkit
zebedee Simple tunneling program for TCP or UDP with encryption
zkt DNSSEC Zone Key Tool
zoneminder Video camera security and surveillance solution