In an emergency, they could act as back-up for each other.
Six will act as back-ups and 24 will take charge of the games.
He and Park Chu-young will act as back-up for Giroud and Podolski for the near future.
Davies, who will act as back-up wicketkeeper to Matt Prior, is the only member of the touring party uncapped at Test level.
A further risk is the lack of specialist fly-half cover on the bench where Alex Goode, who plays full-back for Saracens, will act as back-up to Farrell.
But this method can act as back door, through which the hacker can retrieve the sensitive information through side channel attack.
It may be possible to couple such repositories to more conventional archive-oriented repositories which act as back-end storage and preservation.
Jonny Bairstow, as well as battling to reclaim the number six spot, will also act as back-up wicketkeeper to vice-captain Matt Prior.
The versatile 30-year-old will act as back-row cover for Duane Vermeulen, who is sidelined with a knee injury.
Although Taylor has not made the full squad, he is included in a 17-man England Performance Programme line-up, who will tour India for a month from mid-November and act as back-up for the main party.
