2184-7770
2184-7770
S2184-77702021000400256
10.36367/ntqr.9.2021.256-266
Spain
Spain
30
06
2021
30
06
2021
9
256
266
[
2017
]
[
2019
3
694-7
]
[
2008
]
[
1978
]
[
2002
]
[
2013
34
9-36
]
[
Centro Criptológico Nacional. Gobierno de.
2017
]
[
2015
16-34
]
[
2008
1
68-73
]
[
2016
Vol. 1
]
[
1978
]
[
1989
]
[
1989
]
[
2017
]
[
2017
]