RT info:eu-repo/semantics/article
T1 Securecipher: An instantaneous synchronization stream encryption system for insider threat data leakage protection
A1 Herrera Montano, Isabel
A1 Ramos Diaz, Juan
A1 García Aranda, José Javier
A1 Molina Cardín, Sergio
A1 Guerrero López, Juan José
A1 Torre Díez, Isabel de la
K1 Encryption algorithm
K1 Decryption algorithm
K1 Secure file system
K1 Insider threat
K1 Information security
AB The paper addresses the persistent challenge of insider threat in cybersecurity. Despite advancements in detection and prevention technologies and approaches, the complexity of digital environments and the ingenuity of insiders remain a problem. We propose an encryption algorithm called Securecipher, specifically designed to protect file systems from insider threats. The requirements that an algorithm must meet in this context are outlined, along with a method for its development. A context-based key generation mechanism is introduced, eliminating the need for key storage. A file marking mechanism is proposed that enables protection of the encryption algorithm against specific insider threat attacks. The proposed encryption algorithm meets the requirements posed by insider threats and has successfully passed 87 % of the NIST tests, equivalent to 13 out of 15 tests passed. Compared to conventional algorithms, the proposed encryption algorithm is more efficient in the context of insider threats, allowing access to distant locations instantaneously. In the specific case of the comparison with the RC4 algorithm, it showed a 0.25 s higher speed when accessing the last position of a 128-bytes file. Furthermore, a significant increase in the vocabulary of the encrypted text with Securecipher compared to the original text is observed, approximately 42 times more.
PB Elsevier
SN 0957-4174
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73127
UL https://uvadoc.uva.es/handle/10324/73127
LA eng
NO Expert Systems with Applications, noviembre 2024, vol. 254, 124470
NO Producción Científica
DS UVaDOC
RD 07-abr-2025