Is BYOD secure for your company? | Fieldfisher
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Is BYOD secure for your company?

Over the past years, BYOD has developed rapidely and has even become common practise within some companies. More and more employees are using their electronic devices (e.g., smartphones and tablets) Over the past years, BYOD has developed rapidely and has even become common practise within some companies. More and more employees are using their electronic devices (e.g., smartphones and tablets) at work. The benefits for companies are undisputable in terms of cost-saving, work productivity, and the functionalities that smart devices can offer to employees. However, BYOD can also pose a threat for the security of a company's information network  and systems when used without the proper level of security. On May 15, 2013, the French Agency for the Security of Information Systems (ANSSI) released a technical paper advizing companies to implement stronger security measures when authorizing their employees to use electronic devices.

The agency notes that the current security standards used by companies are insufficient to protect efficiently their professional data. Electronic devices enable to store lots of data obtained directly (e.g., emails, agenda, contacts, photos, documents, SMS) or indirectly (navigation data, geolocation data, history). Some of this data may be considered sensitive by companies (e.g., access codes and passwords, security certifications) and may be used fraudulently to access business information stored on the company's professional network. Thus, the use of electronic devices in the work place contains a risk that business data may be modified, destroyed or disclosed unlawfully. In particular, the risk of a data security breach deriving from the use of an electronic device is quite high due to the numerous functionalities that they offer. This risk is generally explained by the vulnerability of the information systems installed on electronic devices, but also the wrongful behaviour of employees who are not properly informed about the risks.

The Agency realizes that it is unrealistic to want to reach a high level of security when using mobile devices, regardless of the security parameters used. Nevertheless, the Agency recommends that companies implement certain security parameters in order to mitigate the risk of a security incident. These security parameters should be installed on the employee's device within a unique profile that he/she cannot modify. In addition to the technical measures, companies should also implement organizational measures, such as a security policy and an internal document explaining to employees the authorized uses of IT systems and devices. Finally, those security measures should be reassessed throughout the lifecycle of the electronic device (i.e., inherent security of the device, security of the information system before the device is used by the employee, security conditions applied to the entire pool of electronic devices, reinitializing the electronic devices before they are reaffected).

The twenty-one security measures that are outlined in the Agency's paper are categorized as follows:

- access control: renewal of the password every three months; automatic lock-down of the device after five minutes; use of a PIN code when sensitive data are stored on the device; limit the number of attempts to unlock the device;

- security of applications: prohibit the 'by default' use of the on-line store for applications; prohibit the unauthorized installation of applications; block the geolocation functionality when not used for certain applications; switch off the geolocation functionality when not used; install security patches on a regular basis;

- security of data and communications:  wireless connections (e.g., Bluetooth, Wi-Fi) must be deactivated when not used; avoid connecting to unknown wireless networks when possible; apply robust encryption to the internal storage of the device; sensitive data must be shared by using encrypted communication channels in order to maintain the confidentiality and integrity of the data; 

- security of the information system: automatically upgrade information systems on a regular basis by installing security patches; if needed, reinitialize the device entirely once per year.

The Agency explains that these security parameters are incompatible with a BYOD policy involving the combined use of an electronic device both for private and professional purposes. The Agency recommends that professional devices be used exclusively for that purpose (meaning that employees should have a separate device for private purposes), and if the same device is used professionally and privately, that both environments be separated efficiently.

The Agency's paper is available (in French) by clicking on the following link: NP_Ordiphones_NoteTech[1]