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EntityFrameworkCore.DataEncryption with the entity framework core value converter feature, it allows you to store your data by encrypting it.
Install-Package EntityFrameworkCore.DataEncryption.Conversions
Then mark the columns to be encrypted in DbContext.
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Author>(entity =>
    {
        entity
            .Property(p => p.Id)
            .UseIdentityColumn();
        entity
            .Property(p => p.Name)
            .IsRequired()
            .HasMaxLength(2048);
        
        entity
            .Property(p => p.Surname)
            .IsRequired()
            .HasMaxLength(2048);
        entity
            .Property(p => p.Phone)
            .IsRequired()
            .HasConversion(new EncryptValueConverter(key:"89acMXSBpuEBDWHZ"));
    });
    base.OnModelCreating(modelBuilder);
}Visit wiki documentation. Wiki
See for more information visit sample project
