The age one becomes a legal adult in the US is largely the age at which most children are considered adults in the world. A few countries set this age lower, but in most of the Western world, one is considered an adult at 18.
RC4 (Rivest Cipher 4). RC4 is one of the most used software-based stream ciphers in the world. The cipher is included in popular Internet protocols such as SSL (Secure Sockets Layer) and WEP (for wireless network security).C4 (Rivest Cipher 4). RC4 is one of the most used software-based stream ciphers in the world. The cipher is included in popular Internet protocols such as SSL (Secure Sockets Layer) and WEP (for wireless network security).
In that sense, DES offers the security of a 56-bit key (2 56 really distinct possible keys). Yet, if you use a library implementing DES, that library will expect DES keys as sequences of 64 bits (often provided as 8 bytes). Another algorithm with a special rule is RC2. It accepts keys of length 8 to 128 bits (multiple of 8 only); but it also has an extra parameter called effective key length denoted by T1. In the middle of the processing of the key, an internal value is reduced to a sequence of T1 bits, which means that subsequent encryption will depend only on the values of T1 specific bits in that internal value.