84 skills found · Page 3 of 3
FalsinSoft / QSQLite3MultipleCiphersQt SQLite3 encryption extension with support for multiple ciphers
ullasrk / Multiple Image Encryption Based On Mixed Image Element And ChaosNowadays, secure information exchange over internet is one of the biggest challenges. To provide security, Cryptography is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it. In most of the communication, secure image data transmission plays an important role. In this context to improve the encryption efficiency and facilitate, the secure transmission of multiple images, an image encryption using multiple images and chaotic functions is considered in this project. This project presents a new multiple-image encryption (MIE) algorithm based on the mixed image element and piecewise linear chaotic maps (PWLCM). Initially, sender combines original images into a big image, and divides it into many pure image elements. Secondly, the sender scrambles these pure image elements with the chaotic sequence generated by the PWLCM system to get mixed image elements. Thirdly, sender combines these mixed image elements into a big-scrambled image, and segments it into small images of size equal to original images. Finally, these small images i.e., encrypted images, are named with the filenames generated by another PWLCM system. The results obtained were analyzed using various performance evaluation methods like correlation, histogram, entropy, PSNR, NPCR, UACI. Experimental results and algorithm analyses show the new algorithm is very efficient and secure, which is suitable for practical image encryption.
zapdev360 / CipherionCipherion is a robust tool for encrypting and securely storing sensitive information using multiple encryption algorithms, featuring a CLI and MySQL integration.
sudhaus7 / Guard7A Typo3 Plugin to facilitate asymetric RSA encryption of arbitrary fields with multiple public keys
Merevoli-DatLuu / Secure File Storage AppThe software stores and protects your important files with AES 256-bit CBC encryption. Supporting file management and data synchronization in multiple devices on the same account.
werogg / DeprotocolDeChat is a decentralized and highly secure peer-to-peer chat application that provides end-to-end encryption and anonymity for its users. The application uses Tor as the underlying network layer to ensure that all communications are routed through multiple relays, making it virtually impossible for anyone to trace the messages back to their origin
interrupt-software / Vault TransitMultiple exercises to illustrate Vault Transit encryption services
CodeReaper / Unsealed SecretsA guide to public key encryption in multiple languages
Nat-Lab / ShadowmanagerAn extendible script to maintaince multiple shadowsocks server with different encryption method at a time.
surelle-ha / LMSLELeviathan Multiple Security Layered Encryption
mkamran37 / CloudSecurityBased on the IEEE paper of "Securing cloud data under key exposure". The implementation makes use of Bastion algorithm and AONT transform to split the data into multiple parts and then performs encryption and uploads the parts into multiple clouds for security.
xseth24 / Shadowtech.netsolution#!/usr/bin/env bash # This basically just takes all of the instructions from DigitalOcean's "How To Set Up an OpenVPN Server on Ubuntu 16.04" and puts them into a single script. # Define functions. function exportReplace { ek="export KEY_${1}=" sed -i "s/${ek}\".*\"/${ek}\"${2}\"/g" vars } function getPublicInterface { pubInterface="$(ip route | grep default)" pubInterface="$(echo $pubInterface | grep -oP -m 1 "dev .*?( |$)" | head -1)" pubInterfaceLen=${#pubInterface}; if [ "${pubInterface:$pubInterfaceLen:1}" = " " ]; then ((pubInterfaceLen--)) fi ((pubInterfaceLen-=4)) pubInterface=${pubInterface:4:$pubInterfaceLen} echo $pubInterface } function getIPAddress { ip route get 1.1.1.1 | awk '{print $NF; exit}' } function getAdditionToBeforeRules { pubInterface="$(getPublicInterface)" echoStr="" echoStr=$echoStr"\n# START OPENVPN RULES" echoStr=$echoStr"\n# NAT table rules" echoStr=$echoStr"\n*nat" echoStr=$echoStr"\n:POSTROUTING ACCEPT [0:0]" echoStr=$echoStr"\n# Allow traffic from OpenVPN client to ${pubInterface}" echoStr=$echoStr"\n-A POSTROUTING -s 10.8.0.0/8 -o ${pubInterface} -j MASQUERADE" echoStr=$echoStr"\nCOMMIT" echoStr=$echoStr"\n# END OPENVPN Rules" echoStr=$echoStr"\n" echoStr=$echoStr"\n" echo -e $echoStr } # Check root privileges. if [[ $(id -u) -ne 0 ]] ; then echo "This script must be run as root." exit 1 fi # Step 1: Install OpenVPN apt-get update apt-get install -y openvpn easy-rsa # Step 2: Set up the CA directory and switch to it. make-cadir ~/openvpn-ca cd ~/openvpn-ca # Step 3: Configure the CA Variables # Get information from user to customize vars. printf "\n\nSetup will need to customize the VPN server. Some information will need" printf "\nto be collected." printf "\nDon't use quotation marks in any of these. It'll mess stuff up." printf "\nDon't leave anything blank." printf "\n\nPlease enter email address:" read emailAddress printf "\n\nPlease enter country code (i.e., \"US\",\"CA\", etc):" read countryCode printf "\n\nPlease enter state or province code (i.e., \"NY\",\"MI\"):" read provinceCode printf "\n\nPlease enter city name (but remove spaces, i.e., SanFrancisco):" read cityName printf "\n\nPlease enter organization name (could be The Illuminati for all I care):" read orgName printf "\n\nPlease enter organizational unit (Seriously, what does that even mean?):" read OUName printf "\n\nIn a short while, another program is going to ask you to confirm these." printf "\nIt will do this multiple times. You can just press Enter on all of them." printf "\nto confirm." printf "\nIMPORTANT! One of the setup programs will ask you to enter a" printf "\n\"challenge\" password. Leave it blank and just hit [Enter]." #printf "\nHowever, when asked to create a PEM password, be sure to use a strong one." printf "\nWhen a setup program asks you a y/n question, respond with \"y\"." printf "\nPress [Enter] now to continue with install." read -p "" # Customize vars file and run it. exportReplace "COUNTRY" $countryCode exportReplace "PROVINCE" $provinceCode exportReplace "CITY" $cityName exportReplace "ORG" $orgName exportReplace "EMAIL" $emailAddress exportReplace "OU" $OUName exportReplace "NAME" "server" # Step 4: Build the Certificate Authority source vars ./clean-all ./build-ca # Step 5: Create the Server Certificate, Key, and Encryption Files ./build-key-server server ./build-dh openvpn --genkey --secret keys/ta.key # Step 6: Generate a Client Certificate and Key Pair source vars ./build-key client1 # Step 7: Configure the OpenVPN Service # Copy the Files to the OpenVPN Directory cd ~/openvpn-ca/keys sudo cp ca.crt ca.key server.crt server.key ta.key dh2048.pem /etc/openvpn gunzip -c /usr/share/doc/openvpn/examples/sample-config-files/server.conf.gz | sudo tee /etc/openvpn/server.conf # Adjust the OpenVPN Configuration confFile='/etc/openvpn/server.conf' #Note! This var is used later in the script, not just in this section. subString="tls-auth ta.key 0 # This file is secret" oldString=";${subString}" newString="${subString}\nkey-direction 0" sed -i "s/${oldString}/${newString}/g" $confFile subString="cipher AES-128-CBC" oldString=";${subString}" newString="${subString}\nauth SHA256" sed -i "s/${oldString}/${newString}/g" $confFile subString="user nobody" oldString=";${subString}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $confFile subString="group nogroup" oldString=";${subString}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $confFile subString="push \"redirect-gateway def1 bypass-dhcp\"" oldString=";${subString}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $confFile subString='push "dhcp-option DNS 208.67.222.222"' oldString=";${subString//./\\.}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $confFile subString="push \"dhcp-option DNS 208.67.220.220\"" oldString=";${subString//./\\.}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $confFile # Step 8: Adjust the Server Networking Configuration. # Allow IP Forwarding subString="net.ipv4.ip_forward=1" oldString="#${subString//./\\.}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" /etc/sysctl.conf sudo sysctl -p # Adjust the UFW Rules to Masquerade Client Connections fileName="/etc/ufw/before.rules" newRules="$(getAdditionToBeforeRules)" fileContents="$(awk -v "n=10" -v "s=${newRules}" '(NR==n) { print s } 1' ${fileName})" echo "${fileContents}" > $fileName oldString="DEFAULT_FORWARD_POLICY=\"DROP\"" newString="DEFAULT_FORWARD_POLICY=\"ACCEPT\"" sed -i "s/${oldString}/${newString}/g" /etc/default/ufw # Open the OpenVPN Port and Enable the Changes ufw allow 1194/udp ufw allow OpenSSH ufw disable ufw enable # Step 9: Start and Enable the OpenVPN Service systemctl start openvpn@server systemctl enable openvpn@server # Step 10: Create Client Configuration Infrastructure # Creating the Client Config Directory Structure mkdir -p ~/client-configs/files chmod 700 ~/client-configs/files # Creating a Base Configuration fileName="${HOME}/client-configs/base.conf" cp /usr/share/doc/openvpn/examples/sample-config-files/client.conf $fileName ipAddress="$(getIPAddress)" sed -i "s/my-server-1/${ipAddress}/g" $fileName subString="user" oldString=";${subString}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $fileName subString="group" oldString=";${subString}" newString="${subString}" sed -i "s/${oldString}/${newString}/g" $fileName subString="ca ca.crt" oldString="${subString/\./\\.}" newString="#${subString}" sed -i "s/${oldString}/${newString}/g" $fileName subString="cert client.crt" oldString="${subString/\./\\.}" newString="#${subString}" sed -i "s/${oldString}/${newString}/g" $fileName subString="key client.key" oldString="${subString/\./\\.}" newString="#${subString}" sed -i "s/${oldString}/${newString}/g" $fileName echo "">> "${fileName}" echo "cipher AES-128-CBC">> "${fileName}" echo "auth SHA256" >> "${fileName}" echo "key-direction 1" >> "${fileName}" echo "#script-security 2" >> "${fileName}" echo "#up /etc/openvpn/update-resolv-conf" >> "${fileName}" echo "#down /etc/openvpn/update-resolv-conf" >> "${fileName}" # Creating a Configuration Generation Script makeConfigStr=" # First argument: Client identifier KEY_DIR=~/openvpn-ca/keys OUTPUT_DIR=~/client-configs/files BASE_CONFIG=~/client-configs/base.conf cat \${BASE_CONFIG} \\ <(echo -e '<ca>') \\ \${KEY_DIR}/ca.crt \\ <(echo -e '</ca>\n<cert>') \\ \${KEY_DIR}/\${1}.crt \\ <(echo -e '</cert>\n<key>') \\ \${KEY_DIR}/\${1}.key \\ <(echo -e '</key>\n<tls-auth>') \\ \${KEY_DIR}/ta.key \\ <(echo -e '</tls-auth>') \\ > \${OUTPUT_DIR}/\${1}.ovpn " echo "#!/bin/bash" > "${HOME}/client-configs/make_config.sh" echo "${makeConfigStr}" >> "${HOME}/client-configs/make_config.sh" chmod 700 ~/client-configs/make_config.sh # Step 11: Generate Client Configurations cd ~/client-configs ./make_config.sh client1 # Copy VPN configuration to /root, so it's the same path for everyone. cp ~/client-configs/files/client1.ovpn /root
sakilrocks / Crypt Sharea Java CLI tool that allows encrypted file transfer between a server and multiple clients using sockets and AES encryption.
karthikramesh55 / Micro Blockchain ProjectBuilding a mini blockchain with relevant functionalities using Python with multiple functionalities such as creating and loading a trading wallet for transactions, mining user-generated blocks, rewarding system for block mining, hashing of private/public key via RSA and SHA256 encryption, verifying the Proof of Work (PoW) to confirm the addition of a block to a chain.
samuel-lucas6 / DoubleSecA simple, double-paranoid encryption library inspired by TripleSec.
shashwatsoni / Multiple Color Image EncryptionMultiple(finite) number of images are taken together and are encrypted in order to generate a system to send multiple images securely.
bishwahang / 2DESAttackImplementation of 2DES attack, to do exhaustive key search for known plaintext and ciphertext.showing why multiple encryption is not good
necr0potenc3 / UOCH 2.2UOCH (Ultima Online Client Hacker) is a tool with advanced capabilities to modify the game client, allowing to remove encryption and multiple clients support, among others, by necr0potenc3.
prasanmouli / Image Encryption SchemeA chaos based image encryption scheme using Lorenz and Henon's maps with multiple levels of diffusion.
ne0h / CatmailRedesign of well known xmpp with built-in end-to-end encryption to work with multiple devices.
