Các địa chỉ nội bộ không giống như bao gồm trong các tập tin cấu hình DNS cho lý do an ninh. Nó là rất quan trọng đó không tồn tại giữa DNS host trên mạng công ty và máy chủ bên ngoài. các dữ liệu cho các vùng | Server Software Encrypting Network Services CHAPTER 1 6 Authentication Personal identification is another use of cryptography where the user sender knows a secret which can serve to authenticate his her identity. Electronic Signature A digital signature assures the sender and receiver that the message is authentic and that only the owner of the key could have generated the digital signature. Patents Several legal issues exist for SSL technology. If you intend to use OpenSSL for commercial purpose you may need to obtain a license from RSA regarding use of RSA libraries. Here s an excerpt from the README file of OpenSSL Various companies hold various patents for various algorithms in various locations around the world. _YOU_ are responsible for ensuring that your use of any algorithms is legal by checking if there are any patents in your country. This file contains some of the patents that we know about or are rumored to exist. This is not a definitive list. RSA Data Security holds software patents on the RSA and RC5 algorithms. If their ciphers are used inside the USA and Japan you must contact RSA Data Security for licensing conditions. Their web page is http . RC4 is a trademark of RSA Data Security so use of this label should perhaps only be used with RSA Data Security s permission. The IDEA algorithm is patented by Ascom in Austria France Germany Italy Japan Netherlands Spain Sweden Switzerland UK and the USA. They should be contacted if that algorithm is to be used their web page is http . These installation instructions assume Commands are Unix-compatible. The source path is var tmp other paths are possible . Installations were tested on Red Hat Linux and . All steps in the installation will happen in super-user account root . OpenSSL version number is Tarballs It is a good idea to make a list of files on the system before you install Openssl and one afterwards and then compare them using diff to find out what file it .