In today's world, where virtually every step we take leaves a digital footprint, the security of our information has become a critical issue. It's no longer just about preventing someone from stealing our email password, but about understanding that the value of the data It is currently the most valuable currency for companies and a huge vulnerability for users if it is not managed wisely.
Sometimes we get carried away by the convenience of accepting terms and conditions without reading them, but the reality is that most of us have no idea what happens to our information once we click the "accept" button. To prevent our private lives from ending up in just anyone's hands, the data encryption It is presented as the most powerful and effective tool to maintain control over what is ours.
What exactly is encryption and how does it work?
To put it simply, encryption is like putting a message in a safe whose key only the sender and receiver have. Technically, it's the process of transform readable data in an incomprehensible or secret format using a computer algorithm. If someone intercepts that information without the proper key, all they will see is a string of meaningless characters.
The robustness of this system depends directly on the cryptographic key complexityThe longer and more random the key, the harder it will be for an attacker to crack it using brute force methods, which basically consist of trying millions of combinations until the correct one is found.
Within this world, we find two main paths:
- Symmetric encryption: Here, the same key is used both to lock and unlock the information. It's very fast, but it carries the risk that if the key is intercepted during transmission, the entire system is compromised.
- Asymmetric encryption: It's more sophisticated because it uses a pair of keys: a public key (which you can give to anyone) and a private key (which you keep under lock and key). What's encrypted with the public key can only be opened with the private key, eliminating the need to share the secret key.
Encryption under the legal microscope: The GDPR
If you work in the professional or business world, you'll know that the General Data Protection Regulation (GDPR) doesn't mess around. In the Recital 83 It is explicitly mentioned that encryption is one of the recommended measures to mitigate the risks inherent in data processing, ensuring that confidentiality remains intact.
Furthermore, Article 6 highlights that encryption can serve as a adequate guarantee When we want to use data for a purpose other than the original one without needing to request new consent. On the other hand, Article 32 positions it as a mandatory technical measure to guarantee the security of the processing according to the risk.
One very interesting point is Article 34, which tells us that if a security breach occurs but the data was encrypted (and is therefore unintelligible to the attacker), the company may be liable. exempt from communicating the gap to those affected, since the risk of harm is minimal.
Differences between data in transit and at rest
Protecting a file stored on a hard drive is not the same as protecting one that travels over a coffee shop's Wi-Fi. data encryption in transit It is responsible for protecting information while it moves between two points. A very clear example is the HTTPS protocol, which we see in the browser's toolbar with the padlock icon, helping to prevent data theft on public Wi-Fi networkspreventing hackers from intercepting our payments or passwords.
On the contrary, the data encryption at rest This applies to information stored on a device, such as a server or USB drive. The goal here is to prevent the thief from accessing the contents in the event of physical theft of the equipment. A common technique here is TDE (Transparent Data Encryption), widely used by giants like Oracle and Microsoft to secure databases, given that there are dangers of public USB drives that could compromise the system.
Tools and algorithms you should know
Not all ciphers are created equal. Some algorithms are already obsolete, like DES, which would be broken in the blink of an eye today. Instead, modern standards are used, such as AES (Advanced Encryption Standard), which is the basis of applications like WhatsApp or Signal, and is considered extremely secure.
For those seeking maximum security, there are the hardware security modules (HSM)These are processors specifically designed to manage cryptographic keys without them ever leaving the physical device, complying with strict regulations such as FIPS.
If you need to encrypt files on a one-off basis, there are tools like VeraCrypt or BitLocker for entire disks, or even the use of .ZIP files with AES-256 encryption, as long as the password is strong and is sent through a different channel than the file.
Practical settings to protect your smartphone
Having a mobile phone is like carrying a goldmine of personal data in your pocket. To prevent it from becoming a nightmare, it's essential to configure certain settings. The first is... biometric or alphanumeric lockAvoid simple four-digit codes. Activating the option is also highly recommended. automatic data deletion after several failed attempts to log in or use the Repair mode to protect your private data.
Regarding app privacy, the best approach is to apply the rule of least exposure. Check your device's privacy settings to see who has access to your data. location, contacts, or calendar And disable anything that isn't strictly necessary. A flashlight app doesn't need to know your exact location at all times.
Other useful tricks include using search engines that don't track your activity, such as DuckDuckGoand limit ad tracking in advertising settings to prevent ad networks from creating a detailed profile of your consumption habits.
Keep in mind that encryption is a fundamental piece of the puzzle, but it's not the solution to everything. It's vital to combine it with the use of... password managers and two-step verification (2FA), since most security breaches occur due to weak or reused passwords. Maintaining good digital hygiene, from not opening suspicious phishing links to keeping your operating system updated, makes all the difference between being protected and being vulnerable.
