php Programming Glossary: symmetric

Compatible encryption between C# and PHP, ColdFusion, Ruby, Python

http://stackoverflow.com/questions/102496/compatible-encryption-between-c-sharp-and-php-coldfusion-ruby-python

http://stackoverflow.com/questions/10916284/how-to-encrypt-decrypt-data-in-php

asterisk Fname Lname and Email will be encrypted using a symmetric cipher provided by Mcrypt The Password field will be hashed..

C# Encryption to PHP Decryption

http://stackoverflow.com/questions/11873878/c-sharp-encryption-to-php-decryption

498j5 IV 741952hheeyy66#cs 9hjv887mxx7@8y RijndaelManaged symmetricKey new RijndaelManaged symmetricKey.BlockSize 256 symmetricKey.KeySize.. RijndaelManaged symmetricKey new RijndaelManaged symmetricKey.BlockSize 256 symmetricKey.KeySize 256 symmetricKey.Padding.. new RijndaelManaged symmetricKey.BlockSize 256 symmetricKey.KeySize 256 symmetricKey.Padding PaddingMode.Zeros symmetricKey.Mode..

PHP Type-Juggling and (strict) Greater/Lesser Than Comparisons

http://stackoverflow.com/questions/15813490/php-type-juggling-and-strict-greater-lesser-than-comparisons

to constitute an equivalence relation has to be reflexive symmetric and transitive PHP's operator is not reflexive i.e. a a is not.. Floating Point Arithmetic more info . PHP's operator is symmetric i.e. a b and b a are always the same. PHP's operator is not.. to constitute a partial order has to be reflexive anti symmetric and transitive PHP's operator is not reflexive i.e. a a is not..

Which PHP mcrypt cipher is safest?

http://stackoverflow.com/questions/2809855/which-php-mcrypt-cipher-is-safest

precise knowledge on why AES is secure. No other symmetric encryption algorithm has received as much attention by thousands..

Encrypting data in Cocoa, decoding in PHP (and vice versa)

http://stackoverflow.com/questions/321061/encrypting-data-in-cocoa-decoding-in-php-and-vice-versa

to solve in my Cocoa app I need to encrypt a string with a symmetric cipher POST it to PHP and have that script decode the data... dataUsingEncoding NSUTF8StringEncoding NSData symmetricKey @ ThisIsMyKey dataUsingEncoding NSUTF8StringEncoding unsigned.. iv cipherMaxIVLength EVP_BytesToKey cipher EVP_md5 NULL symmetricKey bytes symmetricKey length 1 evp_key iv NSData initVector..

Rewrite Rijndael 256 C# Encryption Code in PHP

http://stackoverflow.com/questions/3505453/rewrite-rijndael-256-c-sharp-encryption-code-in-php

uninitialized Rijndael encryption object. RijndaelManaged symmetricKey new RijndaelManaged It is reasonable to set encryption mode.. Cipher Block Chaining CBC . Use default options for other symmetric key parameters. symmetricKey.Mode CipherMode.CBC Generate encryptor.. . Use default options for other symmetric key parameters. symmetricKey.Mode CipherMode.CBC Generate encryptor from the existing..

Is it possible to have encryption with multiple private keys (PHP)?

http://stackoverflow.com/questions/4605139/is-it-possible-to-have-encryption-with-multiple-private-keys-php

in OpenPGP and other systems you are generating secret symmetric key which is used to encrypt the data itself then this symmetric.. key which is used to encrypt the data itself then this symmetric key is encrypted with Tom's key also symmetric key can be encrypted.. then this symmetric key is encrypted with Tom's key also symmetric key can be encrypted with Jim's and Bob's public key allowing..

Switching between HTTP and HTTPS pages with secure session-cookie

http://stackoverflow.com/questions/5843305/switching-between-http-and-https-pages-with-secure-session-cookie

but this is only done once and cached typically . The symmetric encryption of subsequent traffic is very very fast on modern..

Alternative to SSL - “Manual” Encryption?

http://stackoverflow.com/questions/6658557/alternative-to-ssl-manual-encryption

AES to work on both ends you need to do a Key Exchange for symmetric encryption both parties need to possess the same key. As you.. too. This will imply that you need some form of asymmetric public key cryptography to encrypt wrap the key with the server's.. you can pick up previous sessions with already established symmetric keys so that you can reduce the load on the server by not having..

Securely hash passwords - so much conflicting advice!

http://stackoverflow.com/questions/6879706/securely-hash-passwords-so-much-conflicting-advice

not making your passwords cleartext and not using a symmetric encryption algorithm. You need to use a salt . Doing this prevents.. future. There is a utility called bcrypt which uses an asymmetric variant of blowfish and has the concepts of salt and computational..

What is the best way to encrypt files in AES-256 with PHP?

http://stackoverflow.com/questions/8188662/what-is-the-best-way-to-encrypt-files-in-aes-256-with-php

security encryption share improve this question For a symmetric algorithm use mcrypt see php.net mcrypt . Note though that it..

Perfect Hash Function for Human Readable Order Codes

http://stackoverflow.com/questions/9551091/perfect-hash-function-for-human-readable-order-codes

in PHP the bitwise shift operators and are not quite symmetric and while key key ^ key NUM_BITS is completely reversible key..