nonce

Basic authentication server-side to challenge the nonce, the client to the user name, password, nonce,http method, the requested URI and other information based on the response information generated by the authentication method. ※ Clear Text Pass with no passwordSummary certification steps:1. The client accesses a resource protected by HTTP Digest authentication. 2. The server returns 401 status and

string: nonce, which varies with each request. The customer encrypts the user name and password together with the challenge returned by message 401 and then sends them to the server. In this way, even if there is eavesdropping, he cannot pass each authentication and cannot replay the attack. HTTP is not a secure protocol. The content is transmitted in plain text. Therefore, do not count on how secure HTTP is. Syntax: Challenge = "Digest" digest-Chall

stateless, and the same client will be required to authenticate every access to a resource in the same realm. 2. The client usually caches the username and password and saves it with authentication realm, so you don't normally need to re-enter your username and password. 3. Transmitted in non-encrypted plaintext, although converted to a string that is not easily recognizable, it does not prevent malicious misappropriation of user name passwords.Abstract Certified Digest authentication←http1.1

(Jsonconvert.serializeobject (resultmsg)); } 2. The client invokes the server-side API, which requires signature authentication of the request, and the signature is as follows (1) Get request: According to the request parameter name, all request parameters are sorted alphabetically: Keyvaluekeyvalue...keyvalue string such as: Arong=1,mrong=2,crong=3 sorted as: arong=1, Crong =3,mrong=2 then the parameter name and the parameter value are spliced to get the argument string: Arong1crong3mrong2. p

is stateless. The same client is required to authenticate each access to resources in the same realm. 2. The client usually caches the user name and password and saves them together with authentication realm. Therefore, you do not need to re-enter the user name and password. 3. Non-encrypted plaintext transmission, although converted into strings that are not easily recognized by people, cannot prevent Malicious theft of user names and passwords. ◆ Digest authentication digest AuthenticationAlt

(translated from "Mesh Profile v1.0" 3.8 mesh security)Security ToolboxEncryption functionCMAC functionCCM FeaturesS1 Salt generation functionK1 Export Function (How to understand derivation? ）K2 Network key export functionK3 Export functionK4 Export functionSerial numberSerial number, which is a 24bit value contained in the network layer PDU seq field. Mainly used to avoid replay attacks (replay attacks).Elements in the same node can be shared or no serial numbers can be shared.For mesh network

, users are spoofed to browse malicious websites. Web pages of malicious websites enable browsers to send malicious Intent and start the target activity.2 Figure 3.2 Remote Drive-by Attack0x04 OAuth and Dropbox To authorize the app to use a specified Dropbox account, the Dropbox SDK uses the OAuth protocol. This process starts when the app registers with the Dropbox website for out-of-band registration, then, the app can receive the app key and app secret from Dropbox and hardcode them into th

Objective On the basis of the previous "golang-Blockchain learning 01", we have increased our blockchain workload proof. Knowledge points 1, Blockchain proofofwork (proof of workload) concept, because everyone wants to generate blocks to get rewards, for the sake of fairness, we stipulate that to successfully generate a block must complete the task of the specified difficulty. That is, whoever completes the task with the specified difficulty will successfully generate a chunk. First set aside an

use professional development editing software operations, such as notepad++, and do not use Windows ' own Notepad. Copy Code code as follows: /* Square Times Studio http://www.cnblogs.com/txw1958/ CopyRight 2013 www.doucube.com All Rights Reserved */ Define ("TOKEN", "Weixin");$WECHATOBJ = new Wechatcallbackapitest ();if (Isset ($_get[' echostr ')) {$WECHATOBJ->valid ();}else{$WECHATOBJ->responsemsg ();} Class Wechatcallbackapitest{Public Function Valid (){$ECHOSTR = $_get

' re adjustingmine.pyto check if we have a valid blocks by only checking a section of nonce values Rather than all the nonces until a match. Then Apscheduler would handle running the mining jobs with the different nonce. We shift the mining to the background if we wantnode.pyto mine as a being Web service. By the end, we can have different nodes this are competing for a mining and broadcasting their mined

parameters for obfuscation! Note: This key must be saved in the app and in our webapi! So we agreed on the formula: encryption result = md5 (timestamp + Random Number + key + post or get parameters) The following code is written through the above formula: Because my environment is asp.net mvc, rewrite an Encryption Class ApiSecurityFilter 1. Get Parameters if (request.Headers.Contains("timestamp")) timestamp = HttpUtility.UrlDecode(request.Headers.GetValues("timestamp").FirstOrDefault());

contains the value of the authentication method Digest,realm, QOP (Quality ofprotection) is only set to Auth,nonce as a string of random values, In the following request will always be used, when the survival period after the server will be refreshed to generate a new nonce value; After the client accepts that the request returns, the Username:realm:password is hashed, assuming that the value after the

. There is also a way to use digest validation, of course, can solve this problem, but need to configure the appropriate functional modules on the server. If the server is not controllable (such as temporarily borrowing someone else's server), there is no way to do so.The Wsse verification mode can solve the above problems. No additional configuration is required on the server. The process is as follows:1. Start with two messages: User name and password.2. Create a random

Summary Certification Digest authentication←http1.1 proposed alternative method of Basic authenticationServer-side to challenge the nonce, the client to the user name, password, nonce,http method, the requested URI and other information based on the response information generated by the authentication method.※ Clear Text Pass with no passwordSummary certification steps:1. The client accesses a resource prot

: Keyvaluekeyvalue...keyvalue string such as: Arong=1,mrong=2,crong=3 sorted as: arong=1, Crong =3,mrong=2 then concatenation the parameter name and the parameter value to get the argument string: Arong1crong3mrong2.public static tuplePost request: Serializes the requested parameter object into a JSON-formatted stringProduct Product = new Product () {Id = 1, Name = "Ann", Count = ten, Price = 58.8}; var data=jsonconvert.serializeobject (product);(2) Add TimeSpan (timestamp) to the request header

data must be approved by other users in the network. Therefore, a third-party intermediary structure or trust institution endorsement is not required. Non-tampering and encryption security: The blockchain adopts a one-way hash algorithm, and each newly generated block is promoted in strict chronological order, the irreversible nature of time makes any attempt to intrude or tamper with the data in the blockchain easily traceable, leading to rejection by other nodes, thus limiting related illeg

: Keyvaluekeyvalue...keyvalue string such as: Arong=1,mrong=2,crong=3 sorted as: arong=1, Crong =3,mrong=2 then concatenation the parameter name and the parameter value to get the argument string: Arong1crong3mrong2.public static tuplePost request: Serializes the requested parameter object into a JSON-formatted stringProduct Product = new Product () {Id = 1, Name = "Ann", Count = ten, Price = 58.8}; var data=http://www.cnblogs.com/mr-yy/p/jsonconvert.serializeobject (product);(2) Add TimeSpan (t

: Keyvaluekeyvalue...keyvalue string such as: Arong=1,mrong=2,crong=3 sorted as: arong=1, Crong =3,mrong=2 then concatenation the parameter name and the parameter value to get the argument string: Arong1crong3mrong2.public static tuplePost request: Serializes the requested parameter object into a JSON-formatted stringProduct Product = new Product () {Id = 1, Name = "Ann", Count = ten, Price = 58.8}; var data=jsonconvert.serializeobject (product);(2) Add TimeSpan (timestamp) to the request header

, how can we transfer safely? The answer is: construct raw transaction online, sign raw transaction, and copy the signed TX and then broadcast to Et Hereum Network Func (db Ormbbalias) Constructtxfield (address string) (*string, *big. Int, *uint64, *big. Int, error) {subaddress, err: = db.getsubaddress (address) if err! = Nil {return nil, nil, nil, nil, err } Switch Node {case "Geth": Balance, Nonce, gasprice, err: = Nodeconstructtxfield ("G

password was.Indeed, Craig got e10adc3949ba59abbe56e057f20f883e , the MD5 hash password, who did not know what Alice's password was. However, suppose Craig is holding the string directly on the HTTP header. Send it to the server again, OK? Craig does not have to decrypt this password can also be installed as "Alice" to communicate with the server.This is called Replay Attack.HTTP DigestIn order to avoid being used by the bad guys replay Attack, a simple idea is. Each time we send the server the