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  2. Security token - Wikipedia

    en.wikipedia.org/wiki/Security_token

    Commonly, in order to authenticate, a personal identification number (PIN) must be entered along with the information provided by the token the same time as the output of the token. Attacking. Any system which allows users to authenticate via an untrusted network (such as the Internet) is vulnerable to man-in-the-middle attacks.

  3. One-time password - Wikipedia

    en.wikipedia.org/wiki/One-time_password

    A one-time password (OTP), also known as a one-time PIN, one-time authorization code (OTAC) or dynamic password, is a password that is valid for only one login session or transaction, on a computer system or other digital device.

  4. British Rail Class 73 - Wikipedia

    en.wikipedia.org/wiki/British_Rail_Class_73

    The British Rail Class 73 is a British electro-diesel locomotive.The type is unusual in that it can operate from the Southern Region's 650/750 V DC third-rail or an on-board diesel engine to allow it to operate on non-electrified routes.

  5. Regenerative braking - Wikipedia

    en.wikipedia.org/wiki/Regenerative_braking

    Regenerative braking is a two-step process involving the motor/generator and the battery. The initial kinetic energy is transformed into electrical energy by the generator and is then converted into chemical energy by the battery. This process is less efficient than the flywheel. The efficiency of the generator can be represented by:

  6. Smart key - Wikipedia

    en.wikipedia.org/wiki/Smart_key

    A smart key is an electronic access and authorization system that is available either as standard equipment, or as an option in several car designs. It was first developed by Siemens in 1995 and introduced by Mercedes-Benz under the name "Keyless-Go" in 1998 on the W220 S-Class, after the design patent was filed by Daimler-Benz on May 17, 1997.

  7. Variants of the M113 armored personnel carrier - Wikipedia

    en.wikipedia.org/wiki/Variants_of_the_M113...

    A huge number of M113 Armored Personnel Carrier variants have been created, ranging from infantry carriers to nuclear missile carriers. The M113 armored personnel carrier has become one of the most prolific armored vehicles of the second half of the 20th century, and continues to serve with armies around the world in many roles.

  8. Wi-Fi Protected Access - Wikipedia

    en.wikipedia.org/wiki/Wi-Fi_Protected_Access

    In 2016 it was shown that the WPA and WPA2 standards contain an insecure expository random number generator (RNG). Researchers showed that, if vendors implement the proposed RNG, an attacker is able to predict the group key (GTK) that is supposed to be randomly generated by the access point (AP). Additionally, they showed that possession of the ...

  9. Cryptography - Wikipedia

    en.wikipedia.org/wiki/Cryptography

    Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized: kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία-logia, "study", respectively), is the practice and study of techniques for secure communication in the presence of adversarial behavior.