Objective:
Recently accidentally and colleagues to exchange data security transmission problems, think of their own used RSA asymmetric encryption algorithm, idle down to sum up.
Several other encryption methods:
RSA encryption of Android data encryptionAES encryption of Android data encryptionDes encryption of
Encryption key algorithm public
static final string ecb_pkcs1_padding = "Rsa/ecb/pkcs1paddi Ng "//Encryption fill mode public
static final int default_key_size = 2048;//secret key default length public
static final byte[] Default_split =" #PART # ". GetBytes (); When the content to be encrypted exceeds buffersize, Partsplit is used to block the encryption public
static final int default_buffersize = (DEFAULT_KEY_SIZE/8)-11;// The current sec
static final int default_key_size = 2048;//secret key default length public
static final byte[] Default_split =" #PART # ". GetBytes ()///when the content to be encrypted exceeds buffersize, Partsplit is used for block encryption public
static final int default_buffersize = ( DEFAULT_KEY_SIZE/8)-11;//The current secret key supports the maximum number of bytes encrypted
about the encryption fill: Previously thought that these operations will be able to achieve
understand, now understand.
In the request data, in the parameter, always stitching a token parameter, that time do not understand, now understand.
/** * User login, save private token * * @param appContext * @param username * @param Password * @return gitlabuser User information * @throws ioexception */ Public StaticUserLogin(AppContext AppContext, String useremail, string password)
the time-out problem is the server side to handle, how to handle? If the server's token expires, the server simply queries the token passed by the client to the database and assigns it to the variable token, so that the token's timeout is re-timed.2. Use Session value as tokenClient: The client only needs to carry the username and password to login.Client: The c
First of all, token is a kind of thing, where is the meaning of token existence? People who have learned PHP or other web development know that a thing called a session and a cookie can store something on the server or locally, such as a login state, which can be stored locally for a period of time through a session or a cookie when the user logs in. During this time, users will not have to enter the user n
apply it? Take a look at this explanation:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/49/A9/wKioL1QX85nCkJ5qAABWcdNyC0g731.png "title=" Session. PNG "alt=" Wkiol1qx85nckj5qaabwcdnyc0g731.png "/>This is the solution to duplicate submissions.Summary: The above is the development of the use of tokens and a summary of the session, if there is improper description, please correct me, I will promptly correct and thank you, I know there are more and better use the way, I am here just a
MD5 and RSA are the two most commonly used algorithms in network transmission. After understanding the principles of these two algorithms, you can get a general idea of what encryption is like. However, these two algorithms use different environments and are just complementary.
I. MD5 Algorithm
First, MD5 is irreversible and can only be encrypted but cannot be decrypted. For example, if the plaintext value is yanzi1225627 and the MD5 encrypted string
One project requires php to produce rsa honeymoon for android and ios through openssl. It has been debugging for two days now, and there has been a problem when using the key on the android side. {Code ...} this is one of the errors encountered by android. below is the code for generating the key {code ...... one proje
string, the UserID satisfies this requirement because the UserID is generated and unique by the server and therefore uses the UserID as token.Query local tokens before making a network requestFor example, click on the side bar of the avatar, if not logged in you need to jump to the login interface, has logged into the personal information interface. At this point, you need to query the local token for identification.Private voidInitData () {SP= Getsh
://bbs.csdn.net/topics/190044123 PKCS#8 encoding!!! Then a guess appeared in my mind, in my dreams, in my heart, in my records ... is not the VC not according to Pkcs#8? Call customer side, get reply is: not pkcs#8, but do not remember is pkcs#12 or what. =_= OK, and then see where pkcs#12 is sacred, link I will not be attached. The egg hurts, pkcs#12 is the protocol of the certificate and with the password ah, you just a key string, where is this? Once again in the confusion of thinking calm d
Yesterday I had a hard time worrying about my day's problem. Today I finally got a little eye-catching. It seems that it is necessary to take a rest in this line... Today, it seems that many errors of this type have been made ..
In the past few days, I am working as a client, and the company's product management is moved from the server to Android. This error persists during development:
Android. View. win
When you open the app, there's a flashback, and you'll see an error message from Android Studio, mainly:Unable to add window – Token [email protected] is not validCause analysis: Because a progress dialog box appears when you enter the app, the dialog's initialization must depend on activity, but if the dialog's initialization is placed in the activity's OnCreate method, an error will be made.Because the ac
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