쁘띠코딩

1. DoS (Denial of Service) - TCP SYN/ACK flooding, UDP flooding - VoIP flooding(INVITE, OPTIONS, REGISTER and so on) - Check Sync Reboots : Phone reboot using Check-Sync message. - Session Teardown : Fabricate CANCEL, BYE message ->It makes call end by force. 2. Hijacking - First, remove the normal user using fake or malicious REGISTER message. After that, by registering hacker's information as ..

RADIUS(Remote Authentication Dial In User Service) RADIUS is one of the authentication tool. When we can't verify users inside of the system, We can have RADIUS server. Once we send the authentication request to the RADIUS server, then the server authenticates it and replies the result. RADIUS works on wireless networking, mail services and verious type of networks with UDP protocol. RADIUS has ..

SHA (Secure Hash Algorithm) SHA is developed in USA, When it's started, there's only SHA-0 exsited.Now SHA-256, SHA-224 and SHA-1 is added.SHE-1 is the most famous hash algorithm. SHA algorithm is used to check integrity of critical data. MD5 is also sort of hash algorithm.And this hash function can be used for password which shouldn't decrypt. In openssl, we can see this SHA algorithm, and use ..

Asterisk 1.6 (upper), and Opensips support TLS protocol. I used Asterisk 1.6.1.6 to support TLS calls. This is install instruction. 1. Download Asterisk : Get the lastest version in www.asterisk.org . 2. Download Zaptel, Libpri and other libraries which used in Asterisk. (configure;make;make install) 3. Unzip Asterisk install file get from www.astrisk.org in /usr/src directory. (U can change the..

In security network (like SSL, TLS), the client and server choose ciper which will be used during the communication. Cipher is, the name of algorighm used in encryption, decryption theory. In SSL(TLS) handshake, "Client Hello" time, client sends the list of cipher to the server. After that, in "Server Hello" time, the server sends the exact cipher which used for encryption&decryption during the ..

Openssl Openssl is the library which supports SSL(Secure Socket Layer)v2, v3 and TLS(Transport Layer Security) v1 protocols. besides of that, it also supports various encryption algorithms such as AES, DES, 3DES, SEED and so on. The libray is get from this link. and the lastest version is 1.0.0.GET SOURCE HERE  Once get the source and unzip them,>tar xvzfp openssl-1.0.0d.tar.gz We can see the fo..