SSDs are hot, but not without security risks

Experts caution that SSDs aren't as secure as commonly thought.

Encryption adds another barrier so that hackers have to bypass encryption layers, the controller and then reassemble raw data for a successful hack, said Sean Barry, senior data recovery engineer at Kroll Ontrack. This takes time, during which data may become invalid or useless.

Encryption also makes files on SSDs a lot easier to erase. Like hard drives, SSDs create multiple file copies, but encryption software can help erase secured files, said Kyle Wiens, CEO of iFixIt.

"Every time you write data it might write ... to a different part of the disk and then change the directory table around. So it forgets where the data was written before," Wiens said. Users may delete one file, but a replica could remain untouched in another sector.

The wear-levelling feature of SSDs -- based on an algorithm that erases and writes data evenly across all the cells on a memory chip to prevent some from wearing out faster than others -- makes files harder to completely erase, Wiens said.

Some encryption software monitors the wear-levelling process to track file remnants, which can then be deleted using the secure erase command, said Knut Grimsrud, an Intel Fellow. Secure erase is a command for secure file deletion that needs to be supported by the encryption software.

"If all the software does is write over the top of the LBAs, I don't think it'll be as [effective] on an SSD as it may have missed remnants from the previous wear-levelling or something like that because the software doesn't know about that," Grimsrud said. LBA (logical block addressing) specifies the location of data blocks on storage devices.

Overall, it's easier to delete data from SSDs than from hard drives, which can be a good or bad. Data is stored on electrons in SSDs, and getting rid of electrons flushes out the data, Kroll Ontrack's Barry said. In hard drives, the data has to be overwritten or physically damaged to prevent it from being read.

The data flush could have its own advantage in terms of quickness, but in the wrong hands data on SSDs could be carelessly and easily lost, Barry said.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags solid-state drivesSSD

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Agam Shah

IDG News Service
Show Comments

Cool Tech

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Breitling Superocean Heritage Chronographe 44

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?