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SendMail send tls, sendmail send tls This sendMail is a script written in perl.You can view its help information. [root@ST fupeng]# ./sendEmail sendEmail-1.56 by Brandon Zehm Basically, this help information is very detailed. The following is an example of two emails.Eg1, no encrypted email -F is the sender's email address.-T is the recipient's mailbox [Work @ ST fupeng] $/home/work/fupeng/sendEmail-f dat
used to encrypt the information. Because the "conversation key" is symmetric encryption, the operation is very fast, and the server public key is used only to encrypt the "conversation key" itself, which reduces the time spent on cryptographic operations. Therefore, the basic process of the SSL/TLS protocol is this: (1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "d
" itself, which reduces the time spent on cryptographic operations. Therefore, the basic process of the SSL/TLS protocol is this: (1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "dialog key". (3) The two parties use the "dialogue key" for encrypted communication. The first two steps of the above process, also known as the "
In the past, the author has analyzed many methods which can reduce the delay of HTTPS transmission, such as the reuse of distributed Session;With HSTS enabled, the client opens HTTPS jump by default, adopts HTTP/2 transport protocol, and uses chacha20-poly1305 algorithm to reduce the CPU time of the mobile terminal.These methods can greatly optimize the delay of HTTPS in transmission, and bring a better experience to the users of the website.Recently, I have also considered reducing the HTTPS tr
trustworthy.(2) Public key encryption calculation is too large, how to reduce the elapsed time?WORKAROUND: Every session, the client and server generate a "conversation key" (Session key), which is used to encrypt the information. Because the "conversation key" is a symmetric encryption algorithm, the operation speed is very fast, and the server public key is only used to encrypt the "conversation key" itself, which reduces the time spent on cryptographic operations. (That is, the encryption of
" itself, which reduces the time spent on cryptographic operations. Therefore, the basic process of the SSL/TLS protocol is this: (1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "dialog key". (3) The two parties use the "dialogue key" for encrypted communication. The first two steps of the above process, also known as the "
encrypt the "conversation key" itself, which reduces the time spent on cryptographic operations. Therefore, the basic process of the SSL/TLS protocol is this: (1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "dialog key". (3) The two parties use the "dialogue key" for encrypted communication. The first two steps of the above process, also known as the "
the server public key is used only to encrypt the "conversation key" itself, which reduces the time spent on cryptographic operations. Therefore, the basic process of the SSL/TLS protocol is this: (1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "dialog key". (3) The two parties use the "dialogue key" for encrypted communication. The first two steps of the a
Socket security layer,tls is all called Transport Layer Security, there is no essential difference between the two is to do the transport layer above the encryption (between the transport layer and the application layer). TLS is the name of the subsequent SSL version branch, and it is meaningless to spend a long time arguing about the pros and cons of both. Current TLS
/TLS protocol is this:(1) The client requests and validates the public key from the server side. (2) Both parties negotiate to generate a "dialog key". (3) The two parties use the "dialogue key" for encrypted communication.The first two steps of the above process, also known as the "handshake phase" (handshake).Iv. detailed process of the
generate a "conversation key ". (3) Both Parties adopt the "conversation key" for encrypted communication. The first two steps of the above process are also called handshake ). 4. Detailed handshake process The handshake phase involves four communications. Let's look at them one by one. Note that all communications in the
authenticate the domain names being accessed. If you want your service to support HTTPS, you can register your domain name with CA. There are some free CAS such as GoDaddy, Let's Encrypt, CloudFlare and so on. HTTPS interaction example The following Wireshark log records a GET request sent to the https://github.com/harttle, you can see the main interaction process of several protocols: TCP. The first three rows complete a SYN/ACK (also known as the three-way
TCP three handshake and four wave of the whole process TCP is the host to the host Layer Transmission Control Protocol, providing a reliable connection service, with three handshake confirmation to establish a connection: Bit code is the TCP flag bit, there are 6 kinds of representations: SYN (Synchronous establish connection) ACK (acknowledgement indicates response, confirmation) PSH (push indicates data
This is a network programming interview key points of knowledge, summed up: to establish a connection-three times handshake TCP establishes a connection between the server and the client through a three-time handshake.The so-called three-time handshake (three-way handshake) means that when a TCP connection is established, the client and server are required to sen
Original: https://www.ssllabs.com/downloads/SSL_TLS_Deployment_Best_Practices_1.3.pdf Translator: Shawn the R0ck, (after correcting themselves plus to the back) SSL /TLS Deployment Best Practices Ivan Risti?version 1.3 (September) Copyright? 2012-2013 Qualys SSL Labs abstraction: SSL/TLS is a seemingly simple technology. Very easy to deploy and let her run up, but ... Did she really run? The first part is t
.-Asymmetric encryption: Unlike symmetric encryption algorithms, asymmetric encryption algorithms have two keys: Public Key (Public Key) and private key (Private Key). For example, if the client uses public key encryption, in this case, other people cannot decrypt their public keys. They can only decrypt them using the private key of the server. The RSA algorithm is a typical asymmetric encryption algorithm.-Digital Certificate: a digital certificate is a string of data that contains a public ke
sockets, without being concerned with the details of the SSL and TLS protocols, such as the handshake process, and so on. This makes it easy to use Java to develop secure SSL/TLS servers or clients, and this article will illustrate how to develop SSL/TLS applications in Java using a specific example. Introduction to
When I used httpwebrequest to access other websites, the error "the request was aborted: unable to establish SSL/TLS Secure Channel" appeared. So goog and Baidu compared the problem. The answer is servicepointmanager. servercertificatevalidationcallback write delegate Public responsemodel gethtml (string URL) {servicepointmanager. servercertificatevalidationcallback = validateservercertificate; httpwebrequest request = (httpwebrequest) webrequest. cr
attacks to achieve these security objectives, which is divided into the handshake and application phases: the handshake stage is also called the negotiation stage. At this stage, the client and the server will authenticate the identity of the other party (depending on the PKI system and use digital certificates for Identity Authentication ), negotiate the security parameters, cipher suite, and MasterSecret
http://blog.csdn.net/zuyi532/article/details/7599766 1, TCP three times the role of shaking hands: The purpose of the three handshake is to connect the server to the specified port, establish a TCP connection, and synchronize the serial number and confirmation number of both sides of the connection and exchange the TCP window size information. In socket programming, when the client executes connect (), the
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