Cryptography Mankind has always felt a need to disguise information, even long before the first computers and calculating machines existed. Since... Security > Cryptography |
Substitution cipher Substitution cipher involves replacing one or more entities (generally letters) in a message with one or more other entities. There... Security > Cryptography |
Transposition ciphers Transposition encryption methods involve rearranging data to be encrypted to make them incomprehensible. This may mean, for example,... Security > Cryptography |
Private-key (or secret-key) cryptography Symmetric encryption (also called private-key encryption or secret-key encryption) involves using the same key for encryption and... Security > Cryptography |
Public-key systems The principle of asymmetric encryption (also called public-key encryption) first appeared in 1976, with the publication of a work... Security > Cryptography |
Session keys Asymmetric algorithms (which come into play in public-key cryptosystems) make it possible to eliminate problems related to key sharing... Security > Cryptography |
Electronic signatures The paradigm of electronic signatures (also called digital signatures) is a process that makes it possible to guarantee the sender's... Security > Cryptography |
Certificates Asymmetric encryption algorithms are based on the sharing of a public key among various users. In general, this key is shared via an... Security > Cryptography |
The Vigenère cipher The Vigenère cipher is a symmetric cryptosystem, which means it uses the same key for encryption and decryption. The Vigenère cipher... Security > Cryptography |
Cryptography - Enigma "Never blindly trust a cryptography system" - Gilles Dubertret The need to encrypt messages appeared at the end of World War I... Security > Cryptography |
Introduction to encryption with DES On 15 May 1973, the NBS (National Bureau of Standards, now called NIST - National Institute of Standards and Technology) published a... Security > Cryptography |
Encryption with RSA The first public-key encryption (asymmetric encryption) algorithm was developed by R.Merckle and M.Hellman in 1977. It was quickly... Security > Cryptography |
PGP - Pretty Good Privacy PGP (Pretty Good Privacy) is a cryptosystem (encryption system) that was invented by Philip Zimmermann, a computer analyst. From 1984... Security > Cryptography |
Cryptography laws There are Internet laws, but these are often inadequate and each country has its own legislation - so much so that just a few years... Security > Cryptography |
Cryptography - Secure Sockets Layers (SSL) SSL (Secure Sockets Layers) is a process that manages the security of transactions made on the Internet. The SSL standard was... Security > Cryptography |
Cryptography - Secure Shell (SSH protocol) The Internet makes it possible to carry out a wide variety of remote operations, and particularly server administration and file... Security > Cryptography |
Cryptography - Secure HTTP S-HTTP (Secure HTTP) is a process that protects HTTP transactions and is based on an improvement to the HTTP protocol that was made... Security > Cryptography |
Cryptography - The SET protocol SET (Secure Electronic Transaction) is a protocol that was developed by Visa and MasterCard and that uses the SSL standard. SET is... Security > Cryptography |
Cryptography - S/MIME S/MIME (for Secure MIME, or Secure Multipurpose Mail Extension) is a security process used for e-mail exchanges that makes it... Security > Cryptography |
