WHAT DOES IPSEC MEAN, WHAT DOES IPS MEAN

IPsec is a set of protocol formats used for secure communication over public IP networks, including data format protocols, key exchanges, and encryption algorithms. IPSec provides secure communication between devices that comply with the IPSec standard, even though these devices may be provided by different vendors.

IPS is an intrusion prevention system, a computer network security facility, and a supplement to antivirus software and firewalls. The intrusion prevention system is a computer network security equipment that can monitor the network data transmission behavior of the network or network equipment, and can interrupt, adjust or isolate some abnormal or harmful network data transmission behaviors in a timely manner. With the widespread use of computers and the increasing popularity of the Internet, there is an increasing number of dangers and crimes from inside and outside the network.

Twenty years ago, computer viruses were mainly spread through floppy disks.

IPsec means Internet Connectivity Protocol; Pathway: VPN server; Category: 4GIPVPN, 4GIP**.

IPsec (IP Security) is the long-term direction of secure networking. It provides proactive protection against attacks on private networks and the Internet through end-to-end security. In communication, only the sender and receiver are the only computers that must be aware of IPsec protection.

Within the Windows XP and Windows Server 2003 families, IPsec provides the ability to secure communications between workgroups, LAN computers, domain clients and servers, branch offices (physically remote), extranets, and roaming clients.

As IoT devices continue to be integrated into people's daily lives, the connection between IoT devices and the Internet has become an indispensable condition. So how to ensure the security of network communication when IoT devices are connected to the Internet?

The mature IPsec (Internet Protocol Security) has become the choice for many IoT devices to ensure the security of network communication. IPsec has the following two aspects: protecting the content of IP packets; Defend against cyberattacks with packet filtering and the implementation of trusted communications.

Both of these goals are achieved through the use of encryption-based protection services, security protocols, and dynamic key management. This foundation provides both robust and flexible protection for communications between private network computers, domains, sites, remote sites, extranets, and dial-up users. It can even be used to hinder the reception and transmission of certain types of communication.

Among them, receiving and sending are the most important.

IPsec is a protocol package that protects the network transmission protocol family of IP protocols by encrypting and authenticating packets of IP protocols.

Safety features. The main security features of IPsec are:

1. Non-repudiation.

Undeniable"It can be verified that the sender of the message is the only possible sender, and the sender cannot deny that the message was sent. "Undeniable"is a feature of public key technology, when public key technology is used, the sender uses the private key to produce a digital signature that is sent with the message, and the receiver uses the sender's public key to verify the digital signature.

Since theoretically only the sender has the only private key, and only the sender can generate the digital signature, the sender cannot deny that the message was sent as long as the digital signature is verified. But"Undeniable"Not a feature of authentication-based shared key technology, where the sender and receiver hold the same key.

2. Anti-replayability.

Anti-replay"Ensure the uniqueness of each IP packet, and ensure that in case the information is intercepted and copied, it cannot be reused or retransmitted back to the destination address. This feature prevents an attacker from intercepting a deciphered message and then impersonating the same packet to gain unauthorized access, even if the spoofing occurs months later.

3. Data integrity.

Prevent data from being tampered with during transmission and ensure consistency between sending and receiving data. ipsec uses the hash function to generate an encryption check sum for each packet, and the receiver calculates the check sum before opening the packet, and if the packet is tampered with, the check sum is discarded.

4. Data reliability.

Encrypting the data before transmission ensures that even if the packet is intercepted during transmission, the information cannot be read. This feature is optional in IPsec and depends on the specific settings of the IPsec policy.

What does ipsc mean is introduced as follows:

Induced pluripotent stem cells (IPS cells) refer to the reprogramming of terminally differentiated somatic cells into pluripotent stem cells by the introduction of specific transcription factors.

In 2006, Shinya Yamanaka of Kyoto University in Japan took the lead in reporting the research of induced pluripotent stem cells in the world-famous academic journal Cell. They cloned the OCT3 4, SOX2, C-Myc, and KLF4 transcription factor genes into viral vectors, and then introduced them into mouse fibroblasts, and found that they could induce their transformation, and the resulting IPS cells were similar to embryonic stem cells in terms of morphology, gene and protein expression, epigenetic modification status, cell multiplication ability, embryoid body and teratoma Hu Shigenesis ability, and differentiation ability.

Induced pluripotent stem cells (iPSCs) technology refers to the reprogramming of terminally differentiated somatic cells into pluripotent stem cells by introducing specific transcription factors. Cell reprogramming is the process by which differentiated cells are reversed under certain conditions and return to a totipotent state, either to form an embryonic stem cell line, or to further develop into a new individual.

Differentiation is the result of the selective expression of genes and does not alter the genetic material, whereas reprogramming is in a sense a reversal of differentiation. Unlike classical embryonic stem cell technology and somatic cell nuclear transfer technology, iPSCs technology does not use embryonic cells or egg cells, so there are no ethical issues. In addition, proprietary stem cells can be prepared from the patient's own somatic cells using iPSCs, which greatly reduces the likelihood of immune rejection.

The emergence of iPSCs has aroused strong repercussions in the research fields of stem cells, epigenetics and biomedicine, which has led to a breakthrough new understanding of the regulatory mechanism of pluripotency, and further narrowed the distance between stem cells and clinical diseases. iPSCs have great potential value in the study of cell substitution** and pathogenesis, the screening of new drugs, and the clinical diseases such as neurological diseases and cardiovascular diseases**.