ISO/IEC JTC 1/SC 27
| Projekta Nr. | ISO/IEC 18033-2:2006 |
|---|---|
| Nosaukums | <p>ISO/IEC 18033-2:2006 specifies encryption systems (ciphers) for the purpose of data confidentiality. The primary purpose of encryption (or <i>encipherment</i>) techniques is to protect the confidentiality of stored or transmitted data. An encryption algorithm is applied to data (often called <i>plaintext</i> or <i>cleartext</i>) to yield encrypted data (or <i>ciphertext</i>); this process is known as <i>encryption</i>. The encryption algorithm should be designed so that the ciphertext yields no information about the plaintext except, perhaps, its length. Associated with every encryption algorithm is a corresponding <i>decryption algorithm</i>, which transforms ciphertext back into its original plaintext.</p> <p>An asymmetric, i.e. public-key, encryption scheme allows a sender to use a recipient's public key to transmit an encryption of a message to the receiver, who can use his secret key to decrypt the given ciphertext, thereby obtaining the original message. </p> <p>Such a scheme should be secure in the sense that no information about the message should be leaked to a (resource-bounded) attacker, even if that attacker mounts a so-called 'chosen ciphertext' attack, in which he may obtain decryptions of other ciphertexts. This is the strongest type of attack that has been proposed for a public-key encryption scheme. </p> <p>ISO/IEC 18033-2:2006 specifies the functional interface of such a scheme, and in addition specifies a number of particular schemes that appear to be secure against chosen ciphertext attack. The different schemes offer different trade-offs between security properties and efficiency.</p> |
| Reģistrācijas numurs (WIID) | 37971 |
| Darbības sfēra | <p>ISO/IEC 18033-2:2006 specifies encryption systems (ciphers) for the purpose of data confidentiality. The primary purpose of encryption (or <i>encipherment</i>) techniques is to protect the confidentiality of stored or transmitted data. An encryption algorithm is applied to data (often called <i>plaintext</i> or <i>cleartext</i>) to yield encrypted data (or <i>ciphertext</i>); this process is known as <i>encryption</i>. The encryption algorithm should be designed so that the ciphertext yields no information about the plaintext except, perhaps, its length. Associated with every encryption algorithm is a corresponding <i>decryption algorithm</i>, which transforms ciphertext back into its original plaintext.</p> <p>An asymmetric, i.e. public-key, encryption scheme allows a sender to use a recipient's public key to transmit an encryption of a message to the receiver, who can use his secret key to decrypt the given ciphertext, thereby obtaining the original message. </p> <p>Such a scheme should be secure in the sense that no information about the message should be leaked to a (resource-bounded) attacker, even if that attacker mounts a so-called 'chosen ciphertext' attack, in which he may obtain decryptions of other ciphertexts. This is the strongest type of attack that has been proposed for a public-key encryption scheme. </p> <p>ISO/IEC 18033-2:2006 specifies the functional interface of such a scheme, and in addition specifies a number of particular schemes that appear to be secure against chosen ciphertext attack. The different schemes offer different trade-offs between security properties and efficiency.</p> |
| Statuss | Standarts spēkā |
| ICS grupa | 35.040 35.030 |