So, what can you do? How can you make sure that the contents of online files will never fall into the wrong hands? Use encryption! (Obviously, if you can recover deleted data, there must be backups somewhere.) These backups should eventually age out and get overwritten, but there’s no way for users to know how long that will take.Īnd in some cases, the data might be retained literally for years - for example, in jurisdictions where ISPs and/or cloud-service providers believe they need to hang on to old user data should there be future legal actions. The retention period might be weeks or months, especially if the service has a “previous versions” or “recover your accidentally deleted account” feature. Some of your previous files and data will almost surely live on in your ISP’s or cloud provider’s backups and logs - at least for a while. Your files are on someone else’s server - and only they control the for-real data retention/deletion rules.Įven deleting your entire online/cloud account won’t necessarily delete your files. There’s no way you, as an end user, can guarantee deletion/erasure of anything you post online or save in the cloud.
That’s an excellent question! And the unsatisfactory answer is “You can’t!” “When we intentionally erase data stored in the cloud, how can we be sure it’s really erased?”.Ask whether they are using similar techniques to help protect your network. Also, send your consultant the link to Alex’s Best practices checklists. I follow the recommended steps in my business.
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Attackers can employ various techniques to steal your credentials.Īlso, if you use a consultant to help with your small-business email configuration, recommend that they visit Alex Fields’s excellent ITProMentor site and download his MS 365 Business security guide. The upshot? If you currently access your Office 365 email account with merely a username and a password, you’re potentially a sitting duck. Disable legacy authentication - also known as basic authentication.Configure Sender Policy Framework (SPF), DomainKeys Identified Mail (DKIM), and Domain-based Message Authentication, Reporting, and Conformance (DMARC) to prevent spoofing and to validate email.(You’ll need to purchase Office 365 ATP and add it to your existing 365 subscription.) Enable security features - such as anti-phishing and anti-spoofing policies - that block malicious email.(You’ll need the Cloud App Security add-on.) Enable alerts for suspicious activity such as foreign sign-ins.Ensure that mailbox sign-in and settings changes are logged and that the logs are retained for at least 90 days.
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In a recent post ( PDF download), the U.S. Recently, a malicious hacker brazenly revealed that they possessed one business’s online-backup credentials as proof they could access everything on the company network. Think the cloud is safe? Ransomware attacks are also targeting cloud-stored archives, as reported in a Bleeping Computer article. Those critical archives are being deleted, encrypted, or otherwise damaged as part of an attack. Increasingly, ransomware attacks are targeting not just live data but backup files, too. It’s now possible that malicious hackers know more about your backup system than you do. At one time, keeping complete archives of your data was considered the best defense. Ransomware attacks could now be the biggest digital threat to small businesses and organizations. Ransomware: Your backups won’t protect you
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