20191218 "Introduction to Information Security" third weekly summary

Learning content summary

Week learning data classification and data compression, the digital representation of data: numerical symbol notation, floating point representation like; several common text compression methods: RLE (run-length encoding), Huffman coding, the key character encoding; binary conversion method decimal, floating-point representation; the ASCII and Unicode character set; color determined by the color depth; disadvantages of vector and raster graphics; understand the basic logical (Boolean) operations, and a gate circuit.

At the same time, self-study finished this week, "is self-craft" Chapter V, Section 5 to 7, start reading chapter VI, we learned a = 1, is a tuple and a = 1 is an integer, a variety of types of data containers have a preliminary understanding. Tutle and taught himself drawing and matplotlib, matplotlib_venn. Also completed the production of reference materials throwing dice game.

Textbook learning and problem-solving process

NAND and NOR found a little difficult to understand, after the online access to information to further understand the logic operation related problems, and confirms the teacher said all doors can be used with non-full (or non-use or full) to learn when the gate show

Code debugging and problem solving process in a byte

Before results appear BASE64 encoding more than a b ', through access to information found BASE64 default encoding result byte type, and Python support output string types, through access to information, I will be encoded result forced into a string type of re-export, the problem is resolved .