PRETTY GOOD PRIVACY S/MIME S/MIME FUNCTIONALITY DOMAINKEYS IDENTIFIED MAIL

1. ELECTRONIC MAIL SECURITY
BY
NAME: R.DEVIGA
CLASS: IIMSC.COMPUTER SCIENCE
BATCH: 2017-2019
INCHARGE STAFF: MS. MS. M. FLORENCE DAYANA

2. PRETTY GOOD PRIVACY
PGP is a remarkablephenomenon.providesa confidentialityandauthentication service thatcan be used
for electronic mail and file storageapplication.
• Notation
• Operational description

4. S/MIME
Securityenhancement to the MIME internetemailformat standard based on technology from RSAdata
security.
1.RFC 5322
2.Multipurproseinternetmailextensions
3.Overview theMIME
4.MIMEcontent type

5. • MIMEcontent type:
The bulkof the MIME specificationis concerned with the definitionof a varietyof contenttype
1.Texttype
2.Multiparttype
3. Multipart/mixedsubtype

7. S/MIME FUNCTIONALITY
S/MIME is very similar toPGP.both offerthe abilityto sign and encryptmessage.
FuntionsS/MIME
1.enveloped data
2.signed data
3. clear signed data
4. signed and envelopeddata
Cryptographicalgorithms
1.MUST
2.SHOULD

8. S/MIME MESSAGES
1. Generatefor preparing an envelopeddataMIME entityare algorithm
2. Encryptthe session key with the recipientpublicRSAkey.
3. Prepare a block known as recipientinformation
4. Encryptthe message contentwith the session key.

10. S/MIME CERTIFICATEPROCESSING
S/MIME uses public key certificatethatconfom to version 3 of x.509
1.Key generation
2.Registration
3.Certificatestorage and retrieval
Digital I’dcontains
Owners public key
Ownersname or alian
Expirationdataof the digitalI’d

11. • User suppliedinformation
Address
email address
Enhanced securityservices
1.singned receipt
2.security labels
3.secure mailing lists

13. DOMAINKEYS IDENTIFIEDMAIL
Domainkeys identifiedmailis a specificationfor cryptographicallysigningemailmessage
1.Internet mailarchitecture
Message user agent
Mail submission agent
Mail delivery agent
Message store
2.Email threats
RFC4686 describes the threatsbeingaddressed by DKIM in terms of the characteristics

14. 3.DKIM strategy
DKIM is designed to providean emailauthenticationtechniquethat is transparentto the enduser.
4. DKIM functionalflow
Basic message processing is divided betweena signing administrativemanagementdomain and a
verifyingADMD.

16. Thankyou