A.用对称密钥加密算法加密数据,用非对称密钥加密算法加密对称密钥
B.用对称密钥加密算法加密非对称密钥,用非对称密钥加密算法加密数据
C.只用非对称密钥加密算法加密数据
D.只用对称密钥加密算法加密数据
A.s->next=pFirst; pFirst->next=s
B.s->next=pFirst; pFirst=s
C.s->next=pFirst->next; pFirst=s
D.pFirst->next=s; s->next=pFirst
A.s-> next=p-> next; p-> next=s;
B.p-> next=s; s-> next=p-> next;
C.p-> next=s-> next; s-> next=p;
D.s-> next=p; p-> next=s-> next;
A.front=front->next
B.s->next=rear;rear=s
C.rear->next=s;rear=s;
D.s->next=front;front=s;
A.s->next=q;p->next=s->next
B.s->next=p;q->next=s->next
C.q->next=s->next;s->next=p
D.p->next=s->next;s->next=q
A.s->next=p->next;p->next=s;
B.q->next=s;s->next=p;
C.p->next=s-next;s->next=p;
D.p->next=s;s->next=q;
A.f->next=s; f=s;
B.r->next=s; r=s;
C.s->next=r; r=s;
D.s->next=f; f=s;