Proyecto de definiciï¿½n de una nueva estrategia en Internet para CajaSur

Seguridad en Internet y Comercio Electrï¿½nico

Firma electrï¿½nica

Asegura la integridad de la informaciï¿½n y permite garantizar el no repudio. Se puede conseguir una firma electrï¿½nica mediante el uso de la clave privada del firmante.

Mensaje: ï¿½Hola Mundoï¿½

Emisor

Funciï¿½n resumen (MD5, SHA):

F(x)(ï¿½Hola Mundoï¿½)=ï¿½XXYYï¿½

Cifrado de resumen

con clave privada

ï¿½UNXï¿½

Receptor

Envï¿½o mensaje + firma: ï¿½Hola Mundoï¿½+ï¿½UNXï¿½

consulta clave

pï¿½blica emisor

Descifrado de firma

con clave pï¿½blica

ï¿½UNXï¿½ -> ï¿½XXYYï¿½

Funciï¿½n resumen:

ï¿½Hola Mundoï¿½ ->ï¿½XXYYï¿½

Iguales

ï¿½XXYYï¿½