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Mundarija

Quyidagi roʻyxatdan mundarija sifatida foydalaning. Boblarga boʻlingan har bir qatorda mavzu nomlari berilgan. Mavzu ustiga bosib, kerakli videoga shu zahoti oʻting.

I bob: algoritmlar
1. Algoritm oʻzi nima va u nega muhim?

II bob: kriptografiya
2. Kriptografiya nima?
3. Sezar shifri
4. Koʻp alifboli shifr
5. Bir martalik tasodifiy kalit
6. Chastota turgʻunligi xususiyati
7. Enigma shifrlash mashinasi
8. Mutlaq xavfsizlik
9. Tasodifiy raqamlar generatorlari
10. Arifmetikaning asosiy teoremasi
11. Ochiq kalit kriptografiyasi
12. Diskret logarifm masalasi
13. Diffi-Xellmen kalit almashinuvi
14. RSA shifrlash tizimi (1-qadam)
15. RSA shifrlash tizimi (2-qadam)
16. RSA shifrlash tizimi (3-qadam)
17. Eyler funksiyasi
18. RSA shifrlash tizimi (4-qadam)
19. Endi nimani oʻrganamiz?
20. Tub sonlarni topish sinovi
21. Kompyuter xotirasi nima?
22. Algoritmik samaradorlik
23. Eratosfen elagi
24. Elak yordamida tub sonlarni topish sinovi
25. Tub sonlar teoremasi
26. Xotira-vaqt bogʻliqligi
27. Xulosa (endi nimani oʻrganamiz?)
28. Tasodifiy algoritmlar. Kirish
29. Shartli ehtimollik
30. Tasodifiy tub sonni topish
31. Fermaning kichik teoremasi
32. Fermaning tub sonlarni topish sinovi

III bob: axborot nazariyasi
33. Axborot nazariyasi nima?
34. Yozma tilning kelib chiqishi
35. Alifbo tarixi
36. Rozetta toshi
37. Maʼlumotni kodlash
38. Vizual telegraflar
39. Elektrostatik telegraflar
40. Batareya va elektromagnetizm
41. Morze alifbosi va axborot asri
42. Belgi chastotasi
43. Aloqa tizimi hajmi. Kirish
44. Axborotni oʻlchash
45. Markov zanjiri
46. Aloqa tizimining matematik nazariyasi
47. Axborot entropiyasi
48. Siqish kodlari
49. Tuzatish kodlari
50. O’zga sayyoralarda ongli mavjudotlar qidiruvi

IV bob: kompyuterlar qanday ishlaydi?
51. Kompyuterlar qanday ishlaydi?
52. Kompyuterni nima kompyuter qiladi?
53. Ikkilik sanoq sistemasi va axborot
54. Mikrosxemalar va mantiq
55. MP, xotira, kiritish va chiqarish
56. Qurilmalar va dasturiy taʼminot

V bob: internet
57. Internet nima?
58. Simlar, kabellar va WiFi
59. IP manzillar va DNS
60. Paketlar, routerlar va ishonchlilik
61. HTTP va HTML
62. Shifrlash va ochiq kalitlar
63. Kiberxavfsizlik va jinoyat



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Mundarija

Quyidagi roʻyxatdan mundarija sifatida foydalaning. Boblarga boʻlingan har bir qatorda mavzu nomlari berilgan. Mavzu ustiga bosib, kerakli videoga shu zahoti oʻting.

I bob: algoritmlar
1. Algoritm oʻzi nima va u nega muhim?

II bob: kriptografiya
2. Kriptografiya nima?
3. Sezar shifri
4. Koʻp alifboli shifr
5. Bir martalik tasodifiy kalit
6. Chastota turgʻunligi xususiyati
7. Enigma shifrlash mashinasi
8. Mutlaq xavfsizlik
9. Tasodifiy raqamlar generatorlari
10. Arifmetikaning asosiy teoremasi
11. Ochiq kalit kriptografiyasi
12. Diskret logarifm masalasi
13. Diffi-Xellmen kalit almashinuvi
14. RSA shifrlash tizimi (1-qadam)
15. RSA shifrlash tizimi (2-qadam)
16. RSA shifrlash tizimi (3-qadam)
17. Eyler funksiyasi
18. RSA shifrlash tizimi (4-qadam)
19. Endi nimani oʻrganamiz?
20. Tub sonlarni topish sinovi
21. Kompyuter xotirasi nima?
22. Algoritmik samaradorlik
23. Eratosfen elagi
24. Elak yordamida tub sonlarni topish sinovi
25. Tub sonlar teoremasi
26. Xotira-vaqt bogʻliqligi
27. Xulosa (endi nimani oʻrganamiz?)
28. Tasodifiy algoritmlar. Kirish
29. Shartli ehtimollik
30. Tasodifiy tub sonni topish
31. Fermaning kichik teoremasi
32. Fermaning tub sonlarni topish sinovi

III bob: axborot nazariyasi
33. Axborot nazariyasi nima?
34. Yozma tilning kelib chiqishi
35. Alifbo tarixi
36. Rozetta toshi
37. Maʼlumotni kodlash
38. Vizual telegraflar
39. Elektrostatik telegraflar
40. Batareya va elektromagnetizm
41. Morze alifbosi va axborot asri
42. Belgi chastotasi
43. Aloqa tizimi hajmi. Kirish
44. Axborotni oʻlchash
45. Markov zanjiri
46. Aloqa tizimining matematik nazariyasi
47. Axborot entropiyasi
48. Siqish kodlari
49. Tuzatish kodlari
50. O’zga sayyoralarda ongli mavjudotlar qidiruvi

IV bob: kompyuterlar qanday ishlaydi?
51. Kompyuterlar qanday ishlaydi?
52. Kompyuterni nima kompyuter qiladi?
53. Ikkilik sanoq sistemasi va axborot
54. Mikrosxemalar va mantiq
55. MP, xotira, kiritish va chiqarish
56. Qurilmalar va dasturiy taʼminot

V bob: internet
57. Internet nima?
58. Simlar, kabellar va WiFi
59. IP manzillar va DNS
60. Paketlar, routerlar va ishonchlilik
61. HTTP va HTML
62. Shifrlash va ochiq kalitlar
63. Kiberxavfsizlik va jinoyat

BY Informatika | Khan Academy Oʻzbek


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Telegram and Signal Havens for Right-Wing Extremists

Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.

How to Invest in Bitcoin?

Like a stock, you can buy and hold Bitcoin as an investment. You can even now do so in special retirement accounts called Bitcoin IRAs. No matter where you choose to hold your Bitcoin, people’s philosophies on how to invest it vary: Some buy and hold long term, some buy and aim to sell after a price rally, and others bet on its price decreasing. Bitcoin’s price over time has experienced big price swings, going as low as $5,165 and as high as $28,990 in 2020 alone. “I think in some places, people might be using Bitcoin to pay for things, but the truth is that it’s an asset that looks like it’s going to be increasing in value relatively quickly for some time,” Marquez says. “So why would you sell something that’s going to be worth so much more next year than it is today? The majority of people that hold it are long-term investors.”

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