Best Email Encryption Software

Best email encryption software for individuals
- How to encrypt Gmail and other emails using plugins and extensions ?
- How to encrypt emails using PGP or GPG ?
- How to send self destructing email ?
- Best Secure Email Services
Open Source email encryption software
Best email encryption software for enterprises

How to encrypt Gmail and other emails using plugins and extensions ?

There are a number of plugins and extensions available that can be used to sending encrypted emails to someone. They usually work in the following way :

One has to install the extension in the browser.
After composing the email as usual, the user has to provide a strong password and encrypt it.
The recipient would need the same password to decrypt and read it.
Please note that both the sender and the recipient would need to install the plugin for encrypted email communications.

There are a number of plugins available for various browsers like Encipher It, SecureMail for Gmail, Virtru etc. But, we would strongly recommend to use PGP or GPG instead for encrypting emails using these tools, as using PGP or GPG is quite easy and it is very secure.

How to encrypt emails using PGP or GPG ?

The easiest option will be using Enigmail add-on in Thunderbird.

A user has to install Thunderbird. In many OS like some Linux versions it comes pre-installed.
Install Enigmail add-on in Thunderbird. You can follow the steps mention here for installation : Installation of Enigmail
Now, you can create a GPG key pair. GPG is an Open Source alternative to PGP. If GPG is not already installed, you can get the installation instructions here : How to install GPG ?
Now, you would need to configure Enigmail using your GPG key id. You would get the instructions for doing that here.
Please note that both the sender and the recipient of the encrypted message need to import each other’s public keys. You can find more information on using GPG here : What is PGP ?

One good thing about using GPG is, you can use the same key pair for encrypting your files, folders and even for digitally sign a document. And it is very secure. No one other than the intended recipient will be able to read your encrypted message provided you keep your private key secret.

How to send self destructing email ?

Self destructing emails are emails that become unreadable after a certain length of time or on request of the sender. There are a couple of service providers that enable users to send self-destructing emails, such as Dmail, Digify, Snapmail etc. But, none of them has been very effective in terms of security and privacy.

Pages: 1 2 3 4 5

Calculate the pseudoinverse of a matrix using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

What is the pseudoinverse of a matrix? We know that if A is a square matrix with full rank, then A-1 is said to be the inverse of A if the following condition holds: $latex AA^{-1}=A^{-1}A=I $ The pseudoinverse or the Moore-Penrose inverse of a matrix is a...

Cholesky decomposition using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

What is Cholesky decomposition? A square matrix A is said to have Cholesky decomposition if it can be written as a product of a lower triangular matrix and its conjugate transpose. $latex A=LL^{*} $ If all the entries of A are real numbers, then the conjugate...

Tensor Hadamard Product using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

In one of our previous articles, we already discussed what the Hadamard product in linear algebra is. We discussed that if A and B are two matrices of size mxn, then the Hadamard product of A and B is another mxn matrix C such that: $latex H_{i,j}=A_{i,j} \times...

Perform tensor addition and subtraction using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

We can use numpy nd-array to create a tensor in Python. We can use the following Python code to perform tensor addition and subtraction. import numpy A = numpy.random.randint(low=1, high=10, size=(3, 3, 3)) B = numpy.random.randint(low=1, high=10, size=(3, 3, 3)) C =...

How to create a tensor using Python?

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

What is a tensor? A tensor is a generalization of vectors and matrices. It is easily understood as a multidimensional array. For example, in machine learning, we can organize data in an m-way array and refer it as a data tensor. Data related to images, sounds, movies,...

How to combine NumPy arrays using horizontal stack?

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

We can use the hstack() function from the numpy module to combine two or more NumPy arrays horizontally. For example, we can use the following Python code to combine three NumPy arrays horizontally. import numpy A = numpy.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]]) B =...

How to combine NumPy arrays using vertical stack?

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

Let’s say we have two or more NumPy arrays. We can combine these NumPy arrays vertically using the vstack() function from the numpy module. For example, we can use the following Python code to combine three NumPy arrays vertically. import numpy A = numpy.array([[1, 2,...

Singular Value Decomposition (SVD) using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

What is Singular Value Decomposition (SVD)? Let A be an mxn rectangular matrix. Using Singular Value Decomposition (SVD), we can decompose the matrix A in the following way: $latex A_{m \times n}=U_{m \times m}S_{m \times n}V_{n \times n}^T $ Here, U is an mxm matrix....

Eigen decomposition of a square matrix using Python

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

Let A be a square matrix. Let’s say A has k eigenvalues λ1, λ2, ... λk. And the corresponding eigenvectors are X1, X2, ... Xk. $latex X_1=\begin{bmatrix} x_{11} \\ x_{21} \\ x_{31} \\ ... \\ x_{k1} \end{bmatrix} \\ X_2=\begin{bmatrix} x_{12} \\ x_{22} \\ x_{32} \\ ......

How to calculate eigenvalues and eigenvectors using Python?

by Amrita Mitra | October 3, 2023 | Featured, Linear Algebra | 0 Comments

In our previous article, we discussed what eigen values and eigenvectors of a square matrix are and how we can calculate the eigenvalues and eigenvectors of a square matrix mathematically. We discussed that if A is a square matrix, then $latex (A- \lambda I) \vec{u}=0...