Feeds

Home Office reaches half-way hash in secure data handling

Encryption bureau to operate like internal post office

Remote control for virtualized desktops

Analysis The UK Home Office has introduced procedures to handle encrypted personal data from external partners. However, guidelines on how the new Home Office Central Cryptography service will work raise concerns about possible shortcomings with the service which, while a big improvement, falls below best practice in sectors such as banking.

Procedures outlined in the guidelines follow a major Whitehall review prompted by the HMRC data loss debacle. The guidelines are a break from working practices that saw CDs with sensitive unencrypted data regularly winging their way via internal mail, sometimes to oblivion, but fall short of offering a full end-to-end service.

The Home Office Central Cryptography service (announced in June) will make use of PGP to handle data but, once received, emails will be decrypted and forwarded to their intended recipients within the government department. While the government secure intranet provides security protections, an end-to-end system would be preferable. The reader who forwarded us the documents went further, suggesting it "defeats the whole purpose" of sending data encrypted in the first place.

Files up to 6.5MB in size will go to an email address and a dedicated machine within the central cryptography bureau, while the guidelines call for files between 6.5MB and 50MB in size to be handled through an external email service (gmx.com). Files larger than 50MB are to be sent on an encrypted CD or DVD via either courier or recorded delivery.

Mid-range files are to be left on servers before they are picked up by their intended recipients. These files are too big to email internally but too small to come via recorded media so instead they will be "placed in a 'pick-up' zone on the network folder for immediate retrieval and deletion".

The system uses of symmetric-key cryptography, so both the sender and the Home Office will share the same key for a particular communication. (This is less secure than public-key cryptography where each party uses a set of two mathematically related keys to lock and unlock messages.) External parties are advised to use complex passphrases to encrypt messages and to send them under separate cover, as explained below:

The encryption must be carried out using 3rd-party pre-defined passphrase only. The sender should ensure a strong passphrase is created. The encrypted file may be created as a PGP file or a self-decrypting executable (.exe) file. The passphrase should be sent to the Bureau separately to the encrypted data (the Bureau will contact the sender for passphrase).

Jamie Cowper, director of marketing at PGP, observed that the required use of strong passphrases sent out separately from the main communication, shows the Home Office has sought expert advice (probably from the GCHQ's CESG group) in developing its plans. "You'd be surprised, but some people sent encrypted discs with the passphrase attached on a post-it note," he added.

Top 5 reasons to deploy VMware with Tegile

More from The Register

next story
Regin: The super-spyware the security industry has been silent about
NSA fingered as likely source of complex malware family
Why did it take antivirus giants YEARS to drill into super-scary Regin? Symantec responds...
FYI this isn't just going to target Windows, Linux and OS X fans
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Home Office: Fancy flogging us some SECRET SPY GEAR?
If you do, tell NOBODY what it's for or how it works
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
'Regin': The 'New Stuxnet' spook-grade SOFTWARE WEAPON described
'A degree of technical competence rarely seen'
Syrian Electronic Army in news site 'hack' POP-UP MAYHEM
Gigya redirect exploit blamed for pop-rageous ploy
Astro-boffins start opening universe simulation data
Got a supercomputer? Want to simulate a universe? Here you go
prev story

Whitepapers

10 ways wire data helps conquer IT complexity
IT teams can automatically detect problems across the IT environment, spot data theft, select unique pieces of transaction payloads to send to a data source, and more.
Getting started with customer-focused identity management
Learn why identity is a fundamental requirement to digital growth, and how without it there is no way to identify and engage customers in a meaningful way.
How to determine if cloud backup is right for your servers
Two key factors, technical feasibility and TCO economics, that backup and IT operations managers should consider when assessing cloud backup.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Mitigating web security risk with SSL certificates
Web-based systems are essential tools for running business processes and delivering services to customers.