### block ciphers:

Modern cipher
* All modern ciphers use keys together with plaintext as the input to produce ciphertext.
* Most modern ciphers are block ciphers.
+ Ciphertext-only attack: Math stubs :: Cryptography
  * Every modern cipher attempts to provide protection against ciphertext-only attacks. The process of selecting a new cipher design standard usually takes many years and includes exhaustive testing of large quantities of ciphertext for any statistical different approach from random noise.

Anvil
* Most anvils have both flat and curving surfaces.
  * are extremely heavy. They are made in different sizes. He walked around the villages of Bedfordshire with a small anvil and a few tools on his back. His anvil was wedge-shaped, so that he could knock it into the ground when he needed to do a repair. His anvil is now in the John Bunyan museum in Bedford
  - blocks
  - part of forges
  - software
* can be an endocrine disrupter when used at high concentrations in a lab.

### block | briquette:

Charcoal briquette
* are the easiest to use and best for controlling the temperature.
* produce carbon monoxide, a colorless, odorless killer

### block | bullion:

Gold bullion
* comes in many different forms and is struck by many countries.
* is equal in value to gold eagles or gold sovereigns weight for weight
  - well known as the currency of last resort

Concrete block
* are precast and used as building blocks.
* come in a variety of sizes.

Conduction block
* are the diagnostic hallmark of the disease.
* can cause either bradycardia or tachycardia.
* occurs principally in motor neurons and muscle.

Dice
* are small cubes with different dots on each side.
* are useful for probability, games, counting, various operations, and place value
  - teaching probability, permutations, and combinations
  - usually some sort of regular polyhedra
* tend to accumulate positive and negative energy.

### block:

Ice cube
* Ice Cubes See how fast different sized ice cubes melt.
  * are made by filling a tray with water and putting it in a freezer. Many freezers also have an icemaker. Icemakers make ice cubes and put them in a bin. After that, they can be put in a glass
  - a common household item which exemplify the thermoplastic principle
  - another best choice for treating prickly heat caused due to hot and humid temperature
  - frozen water
* are located in freezers
  - people
* can also serve as a ready supply of safe water in emergency situations.
* can be effective because they are ingesting fluid
  - white instead of clear in appearance when made with hard water
* float on water because they are lighter than the water.
* is shown floating in water with one side above and parallel to the water surface.
* melt in liquid water.

Nerve block
* Most nerve blocks are more dependent on volume of drug injected than the total dose.
* are a most effective way of giving postoperative pain relief
  - only one part of the process in solving a persistent pain problem
* can also help to control pain
  - relieve tone

Pupillary block
* complication of cataract surgery with or without lens implantation.
* is the most common mechanism of angle closure after cataract extraction.

Red block
* are undecayed and blue are decayed atoms.
+ Super Mario Bros. Deluxe, Gameplay, Vs. Game: 1999 video games :: Game Boy Color games :: Mario platform games
  * Game, two players link up using the Game Boy Color link cable. The levels are full of white and red blocks. Red blocks block the player while white blocks make it easier to go through the level.

Sanding block
* are as numerous as, well, grains of sand.
* helps to knock down irregularities on the cut edge.