Щепалкина, Тамара Александровна. Стенография, сокрытие данных в изображениях [Электронный ресурс]: бакалаврская работа: 10.03.01 / Т. А. Щепалкина; Санкт-Петербургский политехнический университет Петра Великого, Институт компьютерных наук и технологий ; науч. рук. М. Б. Трахтенберг. — Электрон. текстовые дан. (1 файл : 1,77 МБ). — Санкт-Петербург, 2016. — Загл. с титул. экрана. — Доступ по паролю из сети Интернет (чтение, печать, копирование). — Текстовый файл. — Adobe Acrobat Reader 7.0. — <URL:http://elib.spbstu.ru/dl/2/v16-2699.pdf>. — <URL:http://doi.org/10.18720/SPBPU/2/v16-2699>.
| Period
|
Read
|
Print
|
Copy
|
Open
|
Total
|
|
Year 2016
|
Quarter 4
|
December
|
10
|
0
|
9
|
0
|
19
|
|
Year 2017
|
Quarter 1
|
January
|
3
|
0
|
3
|
0
|
6
|
|
February
|
0
|
0
|
3
|
0
|
3
|
|
March
|
6
|
0
|
3
|
0
|
9
|
|
Quarter 2
|
April
|
3
|
0
|
2
|
0
|
5
|
|
May
|
3
|
0
|
31
|
0
|
34
|
|
June
|
3
|
0
|
40
|
0
|
43
|
|
Quarter 3
|
July
|
5
|
0
|
17
|
0
|
22
|
|
August
|
5
|
0
|
25
|
0
|
30
|
|
September
|
3
|
0
|
15
|
0
|
18
|
|
Quarter 4
|
October
|
0
|
0
|
34
|
0
|
34
|
|
November
|
5
|
0
|
32
|
0
|
37
|
|
December
|
0
|
0
|
33
|
0
|
33
|
|
Year 2018
|
Quarter 1
|
January
|
2
|
0
|
30
|
0
|
32
|
|
February
|
3
|
0
|
40
|
0
|
43
|
|
March
|
5
|
0
|
53
|
0
|
58
|
|
Quarter 2
|
April
|
8
|
0
|
85
|
0
|
93
|
|
May
|
0
|
0
|
142
|
0
|
142
|
|
June
|
2
|
0
|
206
|
0
|
208
|
|
Quarter 3
|
July
|
3
|
0
|
117
|
0
|
120
|
|
August
|
5
|
0
|
84
|
0
|
89
|
|
September
|
5
|
0
|
87
|
0
|
92
|
|
Quarter 4
|
October
|
2
|
0
|
89
|
0
|
91
|
|
November
|
6
|
0
|
77
|
0
|
83
|
|
December
|
4
|
0
|
105
|
0
|
109
|
|
Year 2019
|
Quarter 1
|
January
|
5
|
0
|
94
|
0
|
99
|
|
February
|
4
|
0
|
67
|
0
|
71
|
|
March
|
3
|
0
|
125
|
0
|
128
|
|
Quarter 2
|
April
|
7
|
0
|
112
|
0
|
119
|
|
May
|
2
|
0
|
202
|
0
|
204
|
|
June
|
4
|
0
|
173
|
0
|
177
|
|
Quarter 3
|
July
|
1
|
0
|
63
|
0
|
64
|
|
August
|
2
|
0
|
29
|
0
|
31
|
|
September
|
2
|
0
|
59
|
0
|
61
|
|
Quarter 4
|
October
|
4
|
0
|
89
|
0
|
93
|
|
November
|
2
|
0
|
129
|
0
|
131
|
|
December
|
5
|
0
|
177
|
0
|
182
|
|
Year 2020
|
Quarter 1
|
January
|
2
|
0
|
28
|
0
|
30
|
|
February
|
8
|
0
|
28
|
0
|
36
|
|
March
|
1
|
0
|
11
|
0
|
12
|
|
Quarter 2
|
April
|
0
|
0
|
0
|
0
|
0
|
|
May
|
0
|
0
|
0
|
0
|
0
|
|
June
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 3
|
July
|
0
|
0
|
0
|
0
|
0
|
|
August
|
0
|
0
|
0
|
0
|
0
|
|
September
|
0
|
0
|
0
|
0
|
0
|
|
Quarter 4
|
October
|
0
|
0
|
0
|
0
|
0
|
|
November
|
0
|
0
|
0
|
0
|
0
|
|
Total
|
143
|
0
|
2748
|
0
|
2891
|
