Simplify the following text for a Grade 13 native English-speaking person.
Original: PGP is often used for signing , encrypting and decrypting texts , E-mails , files , directories and whole disk partitions to increase the security of e-mail communications .
Simplified: PGP is often used for signing , encrypting and decrypting electronic mails ( e-mails ) to increase the security of e-mail communications .